Malicious PDF — malware analysis report

Static analysis result for SHA-256 60d5bf31650f6ade…

MALICIOUS

PDF

98.7 KB Created: 2021-08-07 11:25:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 34bd8762da0be0a3e3a1400a07bee87c SHA-1: 46a7b937df4a698cd23202613bba9ab3544990fa SHA-256: 60d5bf31650f6ade52c006cbdb626d1cafcb4eb30dae7692730aef0960e992b8
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and link farm patterns, indicating it is designed to redirect users to potentially malicious websites. The ClamAV detection and ML classifier strongly suggest a phishing or trojan payload delivery. The presence of multiple compromised CMS upload links further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://philabc.ru/uplcv?utm_term=high+standard+derringer+serial+numbers PDF link annotation
    • https://sokolzgierz.pl/web/uploads/files/24819080919.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16071e26cc364b---sobupudelow.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e426ebcc6bf---56247718572.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/ulr1mahsgvjarn8pie3v0mkq3q/bovadupokavodovosaz.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c5f2ef0bf09---wivubeserux.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7488c658b3---zisinivofawevarezesote.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/d1756017ce1368adcfd8e8053e14c74e/58277497637.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/ae20af0d426802befb65f14394949f55/68599020034.pdfIn PDF document text
    • https://aihr-iadh.org/uploads/FCK_files/file/zavus.pdfIn PDF document text
    • http://heydarbaba.org/resimler/files/napemixizusifut.pdfIn PDF document text
    • http://trustarshida.co/cache/fck_files/file/57118937413.pdfIn PDF document text
    • https://detector-billetes.com/Imagenes/file/lumuxataj.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/8v6s9vu91cpk7qmm7khdmrf2mr/fedimazejodolefijexa.pdfIn PDF document text
    • http://clean-ecology.com/Upload/files/zerudemowuzabexix.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/jhsj9ubs82hcfrgfnkblff0st5/11309943432.pdfIn PDF document text
    • http://staples1981.com/clients/b/ba/ba027a536d51c1d997ee76cae6dc9017/File/kapukivepiturusokavanaxe.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089b8302e726---wipisavolizer.pdfIn PDF document text
    • https://nhathuydesign.com/wp-content/plugins/super-forms/uploads/php/files/pqhj7ekp22jjae1vmf88cr3eoe/bonufoniwidopalij.pdfIn PDF document text
    • http://magyaringatlanadatbazis.hu/dev/_user/file/zikipinodub.pdfIn PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/60392997567.pdfIn PDF document text
    • http://alessandrobelleseveterinario.eu/userfiles/files/25746480454.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ace764595---lagibuvuvevoramanorid.pdfIn PDF document text
    • http://www.azurwelcomeservices.com/userfiles/file/56932285174.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b766f1a823a---18886428980.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_off00011e71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E71 10804 bytes
SHA-256: 30e45694c96f924b606226efac4f0f06bdba871e9de2595bd82de5479689b8b1
font_01_sfnt_off000136dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136DC 17312 bytes
SHA-256: ae462d4ea58509a7a67459f2d904e6f5bc7b8cefe4269cc53fb8241eec9183a1
font_02_sfnt_off00016439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16439 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1