Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe362da20e20b721…

MALICIOUS

PDF

85.1 KB Created: 2021-07-01 11:45:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cb946fbd4ced9f8ea3975dd3b79c5d40 SHA-1: c30e5da98af3a4cf9e9ec52f42f0ad4f15afdcf6 SHA-256: fe362da20e20b721b82ea5cdebfd2f29cf36479a75edb1c3fbb629948f863b41
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution campaign. The presence of a raw IP address in one of the URIs further indicates malicious intent. The ML classifier and ClamAV detection strongly support the malicious verdict, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://ketchas.ru/uplcv?utm_term=wanted+level+cheat+gta+5+pc
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607422348fdab---43123201646.pdf
    • https://robert-zauer.cz/userfiles/file/19635971656.pdf
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/91442809e6a799ab77d5290d0aa47e9b/deseveviz.pdf
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/a49ac9a0f9cee03a026388ff31d8996c/rozibopufisorokojozewepo.pdf
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/492362de39e729172f45abb7950dceeb/16240427686.pdf
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc0a6ea2ca---21835417463.pdf
    • http://157.230.241.115/image/upload/File/lotulupepilawidabamovoxal.pdf
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/1ca96k29sjl8igc4fa15n38v04/visijixonobunonox.pdf
    • https://calmoinc.com/upload/editor/file/83206956402.pdf
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/5fe6c7jjp6age8uqs712mq4r6c/falawa.pdf
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d5670617418---zogibisixuju.pdf
    • http://riceart.ir/basefile/files/nuweradexaferigop.pdf
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2aa254a939---vumuvebe.pdf
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b6cab4fd34---xanuvimupidokomupegabefu.pdf
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/l4ttsemb6cvpv0e2d9ju850a75/23226797935.pdf
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/8dsl21dmf53f8jc0fdmmk5f6oi/11321656907.pdf
    • http://bhk-aindling.de/userfiles/files/bajirajesamolaxerofefu.pdf
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/mu847lfk2e6dtbr16idcrafdue/36277211743.pdf
    • http://xiaohecollege.com/d/files/vujaxibinujiv.pdf
    • https://www.ideaklinikbursa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d355e788b7---timakege.pdf
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/313ce069d3ba9a803205d51921890928/30970874009.pdf
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/j4ce1ga5ovpsfde31rnbdb8obj/nitunigazeba.pdf
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/bce00d3422aaf66b3e44cfb35b04c8c7/sopadonit.pdf
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/m6fnvdf7mtukd7dui2274u3kcb/84571991318.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8ca.bin
a133114d5a247550f8d78d9ed440218a8ac22c688920547398788a6d9ef41ed8
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CA 17468 bytes
font_01_sfnt_off00011612.bin
b6d5af1bc9cd07609e44a4a535e09666f4cf8a6b28e84d136e50f83901e89e44
pdf-font-stream PDF embedded font (sfnt) at offset 0x11612 10504 bytes
font_02_sfnt_off00012dc3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DC3 16792 bytes