Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eb26632cfb01972…

MALICIOUS

PDF

117.5 KB Created: 2021-04-06 20:57:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2a8536ebbb00e5208bf3199f3d1ce5dd SHA-1: de3b82fd859e024c530505a8d399ef41a1a0ec5b SHA-256: 0eb26632cfb019729f995946c3475c399927b71915541358c70eb81ff33e7c08
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://nipisod.ru/strik?utm_term=weber+dcoe+dimensions PDF link annotation
    • https://xuxefakeni.weebly.com/uploads/1/3/4/2/134234722/wutovod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444351/normal_5fcd98138226a.pdfIn PDF document text
    • https://dusomekekonipa.weebly.com/uploads/1/3/4/5/134580960/fc2c5049a1.pdfIn PDF document text
    • https://tizevilujiv.weebly.com/uploads/1/3/1/4/131406709/4599688.pdfIn PDF document text
    • https://dizugupixaxagoj.weebly.com/uploads/1/3/4/4/134440249/5548877.pdfIn PDF document text
    • http://tersq.space/biriba_card_gamewgwtl.pdfIn PDF document text
    • https://vatovuturok.weebly.com/uploads/1/3/1/8/131856009/gifitivugikape-kudamulimof-lepopojaras-zuzutosoxuli.pdfIn PDF document text
    • http://good-production18.site/how_much_is_a_lifetime_fitness_diamond_membershipmm78w.pdfIn PDF document text
    • https://bolifalaloken.weebly.com/uploads/1/3/1/4/131438202/a09e56544.pdfIn PDF document text
    • https://jifofavara.weebly.com/uploads/1/3/4/6/134631997/xupudujimaba_xujaro_mixiga_vipapinamasa.pdfIn PDF document text
    • https://buvupoxiku.weebly.com/uploads/1/3/4/3/134329971/neguwotipazixolev.pdfIn PDF document text
    • https://suwanozafedo.weebly.com/uploads/1/3/4/5/134587456/ca51aaff4c56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378853/normal_5fd5fe6d861b7.pdfIn PDF document text
    • http://bevamifugidujew.scienceontheweb.net/your_baby_week_by_week_download.pdfIn PDF document text
    • http://sosyaltakipcipanelin.com/874817483996sdgi.pdfIn PDF document text
    • http://axecheat6.xyz/gadigerojewubofibowujuy7f04.pdfIn PDF document text
    • https://kobokudebixisog.weebly.com/uploads/1/3/5/3/135390699/jonilama.pdfIn PDF document text
    • https://sobopagugakevul.weebly.com/uploads/1/3/4/8/134881985/rorelajisimumokeso.pdfIn PDF document text
    • https://xedovederufag.weebly.com/uploads/1/3/5/3/135315932/mazev.pdfIn PDF document text
    • https://negedawitadunez.weebly.com/uploads/1/3/4/5/134587096/93369c6d5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tosurok.myartsonline.com/curso_de_violo_para_iniciantes.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018fa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18FA0 4996 bytes
SHA-256: 9a50fcd4874a60905b625a867a9d78a9c6ce173663c0fb68fed2adc4fc72c492
font_01_sfnt_off0001a094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A094 11404 bytes
SHA-256: b0ecafc1c400ec26ebe4fc75881edd4c7a6140720ee0c872f98edde66175c494