Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a2ae3f3697b03ee…

MALICIOUS

PDF

88.9 KB Created: 2021-09-02 21:01:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c80f6540805e1af0657b29ae2cefeb51 SHA-1: dd29ac50b846bacd1e0c3323a57f59213df2e1b4 SHA-256: 6a2ae3f3697b03ee332505977e16dda66a6b0f248e021339bc45cad010d395fd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious or phishing pages. The PDF structure and URL patterns are consistent with phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://infrive.ru/uplcv?utm_term=save+multiple+plots+to+one+pdf+file+python PDF link annotation
    • https://villatoscana-pi.it/userfiles/file/39850726204.pdfIn PDF document text
    • http://bosch-service-center.ru/uploads/files/69256558330.pdfIn PDF document text
    • http://prtourusa.com/FileData/ckfinder/files/20210726_2D11F28BB7AD2DF0.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b8c85d291c6---67583900937.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1609f9ecb5543c---80150235436.pdfIn PDF document text
    • http://grupopiscis.com/upload/files/mobifepaxemibizit.pdfIn PDF document text
    • https://havanic.com/cache/fck_files/file/zalegafikiwimede.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/1255e470d7190c258670aa998e506a14/14556811177.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/12bae2519271993eba388b73d79c72ad/3022887177.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095455f82b04---53209161993.pdfIn PDF document text
    • https://igruppe.no/ckfinder/userfiles//files/42992909305.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16079d5a5ab032---luzuluzusexixetov.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086f9df05e9c---79441885361.pdfIn PDF document text
    • https://pilot-nav.com/ckfinder/userfiles/files/mukizoki.pdfIn PDF document text
    • https://aedwea.com/upload/foto/24491736345.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160713c3631298---zezimiviwubes.pdfIn PDF document text
    • https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c390b7030---dezaturunapefufopofugawuf.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8256ec9e1---92383070844.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/fe43de75158f8c37f30700c9b3e24f0f/tovukinulafibutozasufilu.pdfIn PDF document text
    • https://dolnoslaskialarmsmogowy.pl/imgturysta/files/mepikunod.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/k99cdl451ekifl5usj71fa2b2v/tebefupakoxute.pdfIn PDF document text
    • http://dichvuhieuchuan.com/upload/files/45534371586.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608721a0e806d---11774402396.pdfIn PDF document text
    • http://chocoenglish.com/_UploadFile/Images/file/51032298811.pdfIn PDF document text
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF154 11016 bytes
SHA-256: d774bfa62cfa3999729d4d1db767fc7a4f013516f200ad79808609eaaf726498
font_01_sfnt_off00010ab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB3 19180 bytes
SHA-256: 5101009bdddfb9b47cf71a454694858f92e7b1d340d40949a90a6472633c990e
font_02_sfnt_off00013d4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D4D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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