Malicious PDF — malware analysis report

Static analysis result for SHA-256 bad3754e5eb5321b…

MALICIOUS

PDF

75.7 KB Created: 2021-09-08 03:47:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 2b2703e2e267d4b3f2f92367a33122ca SHA-1: 759a353a50ccd7593beec8cda74748590bad0343 SHA-256: bad3754e5eb5321b66e6bf29c16560e64a2510e454c8856f372d9c817e7ef093
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The presence of these links suggests an attempt to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • 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.
  • 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 http://rzn-house.ru/upload/file/79989594778.pdf In PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160d2fd1b5c021---50908224524.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/da957f315b401499dc7e84e4b0fcfadb/kutegogeferiv.pdfIn PDF document text
    • http://dorinhawear.com/admin/fckeditor/editor/filemanager/connectors/php/fckeditor/editor/filemanager/connectors/php/userfiles/file/53308327943.pdfIn PDF document text
    • https://gastrotest.co/ckfinder/userfiles/files/ritetilinizufakibenafufe.pdfIn PDF document text
    • http://daotaoyduoc.org/wp-content/plugins/super-forms/uploads/php/files/t5mun1ade4te49iekorp0kpfh7/jamedulegofawep.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/addf172ec67e8f92663651485cdb1863/41618033916.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/f7e9e1ecfdac36f3c872bb0b01251797/90666669370.pdfIn PDF document text
    • http://lightofislamonair.org/uploads/files/pedijifagowanizukesuvu.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16076f8a99c8a6---xudejozaxewux.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607729ee77910---satanozelolev.pdfIn PDF document text
    • http://yuqiaohome.com/uploads//files/202108080652136687.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/488396eae5315adfc640cf4691a141e9/53162459038.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/3b26864d1641bbac29cf8619c3eac330/vukozifopizexevadi.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/16086a87f7b795---57682059396.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/h2td25vnm64i0lrjeid873qure/xejutujilen.pdfIn PDF document text
    • http://greathorserider.com/ckfinder/userfiles/files/mesemifufenavujoxixirose.pdfIn PDF document text
    • http://arslanemlak.come/file/lataxivafatidevureduruku.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/9faccd90d7babfcdc610214914e36cf9/50875248878.pdfIn PDF document text
    • https://ritascreation.com/userfiles/file/46729218260.pdfIn PDF document text
    • http://bmcnx.com/userfiles/file/kuraxetovowoguvefaj.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1e867ca569---48258876813.pdfIn PDF document text
    • http://tano-cable.com/d/files/62027727072.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=mpc+1000+operator%27s+manualPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC445 10744 bytes
SHA-256: 1bd677e973de218aa93b11effe96d0374d1c344cde26fe6c5c96ea8ec37b8677
font_01_sfnt_off0000dd14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD14 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF526 17224 bytes
SHA-256: c0078bd5dc24d775bdec4c63d8fc972bdcae6eb666d449b5fdbbb79ddee677e1

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