Malicious PDF — malware analysis report

Static analysis result for SHA-256 204ba92f38ef2f71…

MALICIOUS

PDF

90.1 KB Created: 2021-07-24 15:58:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 4528fe9885f59d6df4119fdda6d8e879 SHA-1: 5461183945574b8dc4a700d82a500a913e26ef9f SHA-256: 204ba92f38ef2f71403fd841e1728b52654c13f106c7ae588036e661b33e6c0f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users to potentially malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification further support its malicious nature. The file's structure and URL patterns suggest it's part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9744

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/6ag2tq79q0p8vt1nfaa17eb4i5/kujozu.pdf In PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/5f2d8a431bc9e5ed9d591f839e1757a9/zezubapilenidomaj.pdfIn PDF document text
    • http://bogaarchitetti.it/userfiles/files/52001449084.pdfIn PDF document text
    • http://bbpcosmetics.com/admin/upFiles/2021-7/file/rexejit.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b022924a1dc---61016989533.pdfIn PDF document text
    • https://myupfield.link/wp-content/plugins/super-forms/uploads/php/files/s3lugn8prsscn9fqdtkqc5trko/sufutigejuzugufamumigifu.pdfIn PDF document text
    • https://denizlihorozu.com/resimler/files/55866594362.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c62e5b4f363---73809881243.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5e904143e---bigowipuvogomanu.pdfIn PDF document text
    • http://minhledtran.com/luutru/files/72955689003.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/migoboj.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3663acc700---61214390944.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/75abf7b76f4b90807a8d39629a9406ab/gewezejarofifutoganaba.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a6640dc96a7---fekubu.pdfIn PDF document text
    • http://suleymanporoy.com/img/userfiles/files/wopixupinog.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/4a9b5d74ba68ec136331bc90e5060711/56696952711.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/cb0755f75be032acf97ab4bf917975e4/63988511594.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/bb71be5e6fc8b4a7917970f02198674e/66865652004.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/3b9ed9b211d2c51f4353b96469957579/54377397567.pdfIn PDF document text
    • https://marathonroller.com/userfiles/files/jitojo.pdfIn PDF document text
    • http://amctop.com/board_data/editor_img/file/202105250258.pdfIn PDF document text
    • http://kath-kiga-bw.de/bilder/berichte/file/fawofofiwowodalumabij.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/1nsm364804j86h0u6hui8sh7s0/75933090234.pdfIn PDF document text
    • http://music-summer-courses.eu/upload/files/zesozibur.pdfIn PDF document text
    • https://divinesacredshakti.com/wp-content/plugins/super-forms/uploads/php/files/0ea4e04c0443367998ab90cd71dbf23a/44501675255.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/4251aa78e1b8bd76f36d0ccbfcf17bc7/36193266112.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+resize+a+picture+to+passport+sizePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f587.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF587 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010d9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9E 10452 bytes
SHA-256: ee92b77e12bd2625d107e9277fea6599cbb2ebd2ea027c3d8ce643431be0b026
font_02_sfnt_off00012595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12595 16928 bytes
SHA-256: c0592e873637150f4d73f0fb59c3d1600fa42d9e89a579737a8b2badd17fce4b
font_03_sfnt_off000151ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151AB 1692 bytes
SHA-256: 6df00093d1a1fd8b8f95901b42ba2863538c90606311dd4adf1993a433792d13

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