Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bdd1471024994ff…

MALICIOUS

PDF

76.5 KB Created: 2021-06-09 14:53:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b674420e4bbe6a5b5760cd3867b96499 SHA-1: e68b0c2fdffc30ee51d71fca44cbc8aa3df80f05 SHA-256: 6bdd1471024994ff094c26fdaebc37ddf8ae98f5517aa13d7e5d02d2b27c4c81
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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://laborke.ru/pbw?utm_term=always+running+by+luis+rodriguez+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4411500/normal_5fcf5d046dddf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414680/normal_603422ea84029.pdfIn PDF document text
    • https://lifezudo.weebly.com/uploads/1/3/0/7/130739479/b3bb0a5c3e1ad4.pdfIn PDF document text
    • https://bamufikike.weebly.com/uploads/1/3/1/6/131606241/9455176.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453907/normal_60bed4885f332.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380210/normal_5fe2b3c148fb2.pdfIn PDF document text
    • https://jobawanajofuru.weebly.com/uploads/1/3/4/0/134042661/6941611.pdfIn PDF document text
    • https://gifivetusox.weebly.com/uploads/1/3/4/7/134736849/6757446.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367944/normal_60449f795aa04.pdfIn PDF document text
    • https://lumixomenuvaw.weebly.com/uploads/1/3/4/7/134745504/98e7367f.pdfIn PDF document text
    • https://jurugifako.weebly.com/uploads/1/3/4/8/134869201/ledozezivusi_xufemila.pdfIn PDF document text
    • https://zipazoraxegav.weebly.com/uploads/1/3/4/3/134325660/xaganegofajifalapi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444386/normal_60011f1031b9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376625/normal_6057c7efe065c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411708/normal_603881d11392e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417046/normal_6047bb0597cfd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459921/normal_60bd8c9583176.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mujefapufefi.pbworks.com/f/8346254185.pdfIn PDF document text
    • http://sejiliki.pbworks.com/w/file/fetch/144668808/marvel_contest_of_champions_hack_ios_no_human_verification.pdfIn PDF document text
    • http://tojasakamu.pbworks.com/f/60674453063.pdfIn PDF document text
    • http://biribivit.pbworks.com/w/file/fetch/144806961/54775721795.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_off0000ecb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB1 5584 bytes
SHA-256: 8421c165d40db67354547fbf087d58a5a3075337f773a606729811db6400f01f
font_01_sfnt_off0000ffe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE6 10660 bytes
SHA-256: 1386efc427f2a243b4d69489886464717d43c8ba8ff283d0f20306d55e1b7ad0

Open this report in the interactive analyzer, or submit your own file for analysis.