Malicious PDF — malware analysis report

Static analysis result for SHA-256 89995666450a3a87…

MALICIOUS

PDF

77.5 KB Created: 2021-03-14 17:55:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 483d3e22c2354219b4e470a3616e7156 SHA-1: 84751b4ddc125a86b55960fd626827dee1bd5166 SHA-256: 89995666450a3a8788785dce6998980c93e0c96269fec810a0812bf5d11c65bb
156 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, identified as a PDF SEO link farm. The primary URL leads to a page with a keyword that appears to be a lure. The presence of numerous links to other PDFs, many hosted on file-sharing services, suggests an attempt to manipulate search engine results or distribute further malicious content. While no scripts were explicitly extracted, the PDF structure and the nature of the links strongly indicate a malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bologen.ru/wix?keyword=cult+party+kei+fashion
    • https://zedusolurifi.weebly.com/uploads/1/3/3/9/133999882/suwobe_rogud_vebodijivel_pabenag.pdf
    • https://bonuwokepav.weebly.com/uploads/1/3/4/5/134592975/e7051.pdf
    • https://cdn-cms.f-static.net/uploads/4485014/normal_604d0b2ea847a.pdf
    • https://cdn.sqhk.co/luzigagoguna/LQhf4gg/tales_of_lazarus.pdf
    • https://cdn-cms.f-static.net/uploads/4471946/normal_6041122db4954.pdf
    • https://cdn-cms.f-static.net/uploads/4474475/normal_60292fdc946be.pdf
    • https://cdn.sqhk.co/gujowaxexag/hcAiehf/nowoxepufavifavumesufi.pdf
    • https://cdn-cms.f-static.net/uploads/4478402/normal_601721ba5b51c.pdf
    • https://cdn-cms.f-static.net/uploads/4473640/normal_5fe77e5a59713.pdf
    • https://cdn-cms.f-static.net/uploads/4454967/normal_6013ae61c040b.pdf
    • https://static.s123-cdn-static.com/uploads/4446774/normal_5ffaaa78bfdc6.pdf
    • https://sirutobij.weebly.com/uploads/1/3/0/7/130776617/509e2.pdf
    • https://static.s123-cdn-static.com/uploads/4486965/normal_5fccd1b0b305b.pdf
    • https://cdn-cms.f-static.net/uploads/4414688/normal_60469b2a5aa9c.pdf
    • https://cdn.sqhk.co/lovaxixifew/bjaE4ig/tofidukek.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gozifep/pofivozalererizemadevap.pdf
    • https://s3.amazonaws.com/mudurixo/20632712972.pdf
    • https://s3.amazonaws.com/wajufifenoxuj/21887295753.pdf
    • https://s3.amazonaws.com/lusabifef/enlightenment_now_audiobook.pdf
    • https://s3.amazonaws.com/bajuse/xenibusaris.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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e32f.bin
bfc358809a1f537bba78fdf8136258c7ae48cd6802bc3714d15172edb95fb294		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE32F 4336 bytes
font_01_sfnt_off0000f289.bin
89e6a92a36694d473f886b865b0546be9f249850a98cebc980fccde56654851b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF289 5060 bytes
font_02_sfnt_off000103c2.bin
5d4fbbcba15efe3887a37ca9293ad23e6dbb0366d09c69cf110f07612343c29e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103C2 11180 bytes

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