Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d0c749ce4ecf233…

MALICIOUS

PDF

73.5 KB Created: 2021-06-08 19:50:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: edac514156497f24f50c52c34133c5e6 SHA-1: 09936b14c35f5d3102b446238e7cef4c88b3ff50 SHA-256: 3d0c749ce4ecf2334459db20800ba3eead298831ac607b0c7631eb9d47fb632b
186 Risk Score

Malware Insights

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

This PDF document is classified as malicious, exhibiting characteristics of a phishing lure. It contains a link farm with numerous external URLs, many hosted on disposable domains, designed to redirect users. The document body, though obfuscated, suggests a lure related to 'Cinema download for android', likely to entice users to click through the malicious links. The presence of a PDF_SEO_LINK_FARM heuristic indicates a deliberate attempt to create a network of redirecting links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://irlanc.ru/pbw?utm_term=cinema+download+for+android PDF link annotation
    • https://batarodev.weebly.com/uploads/1/3/1/3/131380453/0b934d87d045688.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413838/normal_605fd4dbeaa6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407316/normal_60228461952eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502870/normal_60b83cb93f7ea.pdfIn PDF document text
    • https://bamufikike.weebly.com/uploads/1/3/1/6/131606241/madag_surumositoz.pdfIn PDF document text
    • https://giximanuv.weebly.com/uploads/1/3/4/5/134526051/wikiwav.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496592/normal_5ffa506a3226a.pdfIn PDF document text
    • https://duvujisukodat.weebly.com/uploads/1/3/4/6/134674851/lanateritofodezub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490917/normal_60570e23af659.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417312/normal_5fd5fe64020d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380695/normal_600e0d62cfe2c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://supatibu.pbworks.com/w/file/fetch/144428103/tigejofirajuxomulex.pdfIn PDF document text
    • http://paditoxef.pbworks.com/f/43724333525.pdfIn PDF document text
    • http://zezupagijene.pbworks.com/f/82320825994.pdfIn PDF document text
    • http://fujiserefi.pbworks.com/f/78034122973.pdfIn PDF document text
    • http://duriwug.pbworks.com/w/file/fetch/144820803/dizivedukuk.pdfIn PDF document text
    • http://ralogotuxa.pbworks.com/w/file/fetch/144756204/nadakojejififabov.pdfIn PDF document text
    • http://xuruzinijub.pbworks.com/w/file/fetch/144423342/strong_adjectives_list.pdfIn PDF document text
    • http://mulasamesi.pbworks.com/w/file/fetch/144838092/nitro_pro_64_bit_free_download_filehippo.pdfIn PDF document text
    • http://topolopugad.pbworks.com/f/vowid.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_off0000e581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE581 4872 bytes
SHA-256: adfeef35390834ef915e6abca739d7e9bd8b16e3bec70e082c3f62b51a9ea424
font_01_sfnt_off0000f608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF608 10192 bytes
SHA-256: ae11687974230eda10973a73711a3a51f94849791bef1b16c301c8f7c5f6e4bd