Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b9b2ea30657b968…

MALICIOUS

PDF

87.6 KB Created: 2021-07-14 02:57:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f15a3c5d5ebc3c1b9a377a3c539c1635 SHA-1: 3ffef4a6928717c1156548ace3bf6f74c2a70b94 SHA-256: 5b9b2ea30657b968056db67a1aacbddd449ce759982356efd5a7dc255083b449
196 Risk Score

Malware Insights

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

The sample was identified as malicious by multiple heuristics, including a high-confidence ML classifier and ClamAV detection. The heuristics indicate the PDF is part of an advance-fee scam, using lures related to lotteries, prizes, and parcel delivery. It also functions as a link farm, directing users to compromised WordPress sites and other domains hosting further malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/f966221aa69d71b34e91ab274b0c1f78/14352388737.pdf In PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/e69f194663f97f3c60f708406ef89931/seratufuti.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/81994355298.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/1ae089f965083f0e6ecfdc11612a0ed3/wogubodurokununidi.pdfIn PDF document text
    • https://rockyshairsalon.com/wp-content/plugins/super-forms/uploads/php/files/inf1uur6b0rn8f7emise4h8fab/taginodem.pdfIn PDF document text
    • http://gloexdr.com/wp-content/plugins/super-forms/uploads/php/files/a999fca525c42ef43372f66c49a3a139/juladerukopepasomorivep.pdfIn PDF document text
    • http://denis-lefebvre-services.com/fichiers/file/kovizivawogisemazeloba.pdfIn PDF document text
    • https://vayamcs.com/content_files/files/xuzur.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a9aa567abe4---sedipetuzolifadux.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/kisedofisoj.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/qbav755eaqvpsjsub5hsselspg/gafiwas.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/b1504cbe8e74cafd364735e2f89151a6/momimekifagedalivag.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/d43hldm1cgnolr44qnag4n2lv5/72829143215.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/1ccf6b4e0f87dfa7fed9932569fd523f/36130939894.pdfIn PDF document text
    • http://weighlessthisyear.com/ckfinder/userfiles/files/lebozisebuletavakuxaf.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/1j0cui7j3lhfni5rmd5is2ep67/juvidupobalu.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/51ac7c933aa6557a2db4466e0ab41280/3974845299.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/3a5b1c9f79ff797be48233596ba2d8b0/87706268543.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/10rqg06n5pqhi59n1rmdsdav6u/3132821096.pdfIn PDF document text
    • http://bestapp4u.com/admin/uploadedfiles/file/74269260971.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c7a5388f1b8---siritubir.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/52271305146.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/kazoxorala.pdfIn PDF document text
    • http://uticachemical.com/files/upload/files/9941622385.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=free+puzzle+powerpoint+templatePDF 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_off0000f43e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF43E 10468 bytes
SHA-256: 6ddb9ccbe822dd482e1ab94730121abd1a57c5a13ff159f2d53210f2bfc8dcf6
font_01_sfnt_off00010c0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001241c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1241C 17368 bytes
SHA-256: 2c864529319f7c11451fa498af373012bd6d6991377a48536d0f0b9fa3dc8d38