Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3ad210ecb333d30…

MALICIOUS

PDF

90.2 KB Created: 2021-08-05 23:14:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 1eba26809df94ef31642e8518f13f330 SHA-1: 1af2e0a71554d60710cc682bfbb5d5d19f244db1 SHA-256: c3ad210ecb333d30e7370bf8b6c82957144725d578a86b765ef40f6f04b0d90e
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised websites, suggesting it is part of a link farm designed to redirect users to malicious content. The presence of a visual download button lure further supports the attack pattern of tricking users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/83a8b1a1fbe420751e320916ef1958e3/zubadokiwagawuxadijusejo.pdf In PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1609b7178010c2---58327818132.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/frst1ai2iaobim06te9iai54b0/15475552100.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/b8ed582ef95e7a09793e40631a24f933/pufudajuxivedenoki.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16083656943652---26330872746.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/63985475958.pdfIn PDF document text
    • http://tunglamgarden.com/images/fck/file/7903923640.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/manupumowovoposapinikuja.pdfIn PDF document text
    • https://tcremich.lu/files/files/pabikesaj.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/2810321217.pdfIn PDF document text
    • https://kovtec.pl/eurostyl/photos/file/nitenifu.pdfIn PDF document text
    • http://short-story.ru/upload/file/zizivasasana.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/648b21ba58eb19fa90b30ca4688ee859/wezamomapejurenatadu.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/c320bc871eff1cddd2b8f8af5bae12d2/68100566999.pdfIn PDF document text
    • https://abe-rdc.com/userfiles/file/21934404119.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/pemadiwonegefena.pdfIn PDF document text
    • https://plasy.com/uploads/file/jiwidiw.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/88594104570.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/i7rm1cvugcllket33m6g3h0nu4/pofexikedomu.pdfIn PDF document text
    • https://jgranit.pl/userfiles/file/14216435985.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bfdd75c3201---wisak.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607c58b49a742---28982350744.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=the+sims+3+late+night+download+free+full+version+pc+gamePDF 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_off0000fbdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000113f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F2 11452 bytes
SHA-256: 113f9a5f24055eb2dc0f79f0329baf01a86a23f784ead6c875e5cc87f1845721
font_02_sfnt_off00012ec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EC5 17048 bytes
SHA-256: 68ba30807c86e34a79f53a508a01faafcd32672bfee9ef7ea38c1a4a1a89a6d7

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