Malicious PDF — malware analysis report

Static analysis result for SHA-256 468329164d85674d…

MALICIOUS

PDF

91.6 KB Created: 2021-09-02 12:24:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7c7b757c7b9ee167312a65c2ac99e928 SHA-1: aa0d9140964d1f16dd6ed85d7deef88ec913ada8 SHA-256: 468329164d85674d792a98cb06f159fc05503d0c7688dd9df2f51e0844b624fe
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on compromised WordPress sites, suggesting it's designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. No scripts were extracted, but the link farm pattern is a common lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9906

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 https://chcial.ru/uplcv?utm_term=firstborn+book+pdf PDF link annotation
    • http://www.reenactmentmarket.eu/images/wyswig_images/file/88998713139.pdfIn PDF document text
    • https://anne-berger.de/sites/anne-berger.de/files/fkcfile/9806643047.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/2n01lrpqa1t8p13pa7b80ltbr0/liwikekap.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d007e4e83b9---52027568929.pdfIn PDF document text
    • https://matfreklam.com/calisma2/files/uploads/mojesiliduzi.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607208aac1e5e---taguvinonetowo.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed7bd7ddc05---6000123511.pdfIn PDF document text
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/280066855e4b338868a89038d6181be4/27520527310.pdfIn PDF document text
    • http://china-zub.ru/userfiles/file/wuruwizebojulevovumogegab.pdfIn PDF document text
    • http://we2meeting.com/ckfinder/userfiles/publics/files/53390319102.pdfIn PDF document text
    • http://georgekoldun.com/var/upload/file/sovetepunoti.pdfIn PDF document text
    • http://richardarnoldalumni.com/clients/a/ad/ad1dcfa6f69ac51e3fe6bec18f6cf6d6/File/zakozufonikena.pdfIn PDF document text
    • http://beijingbeat.com/contents//files/52875866150.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160bd8a27e2542---49729871870.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/u1db3vnrqhl668qqd5boo25c9c/zimisiwomopixoti.pdfIn PDF document text
    • https://kga-am-adlergestell-ev.de/kga/ckfinder/userfiles/files/74840864142.pdfIn PDF document text
    • http://bsinteriordesigner.com/userfiles/files/56292484999.pdfIn PDF document text
    • https://baohohoanglong.com/userfiles/file/67506349019.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/s16ti24pidj0bk4ptr6tu4ps61/88207016816.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cac50373b5---xofuzo.pdfIn PDF document text
    • http://sovaimm.it/userfiles/files/jugokapedobekeperosusag.pdfIn PDF document text
    • http://meimagedance.tw/ufiles/files/44709365594.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/fujodokabid.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/be757ad0a8e905f8b4ade65f8ca6a08b/53571990863.pdfIn PDF document text
    • https://willmarareachamber.com/ckfinder/userfiles/files/69741503294.pdfIn PDF document text
    • http://sanphamhanquocymy.com/uploads/files/53652893542.pdfIn PDF document text
    • https://munord.com/wp-content/plugins/super-forms/uploads/php/files/f05ebec93b1282d3bc311a9ce3612ac6/raborawusesuvotevegebujib.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_off0001022c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1022C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011a43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A43 10360 bytes
SHA-256: 1e0afc78ac8b6b39ea4e85c4536f6e0d37cbe1528e8926d8b6929c3cc13900ad
font_02_sfnt_off0001317c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1317C 18536 bytes
SHA-256: d53604ad229609047bd091f9c391172701868cb9d137ff7eb60a5f289ad2e605

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