Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f33c44fe7326a72…

MALICIOUS

PDF

79.3 KB Created: 2020-12-16 20:54:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: cf4f6d00940108712e885453101ba937 SHA-1: 277004c366cd4072e4e7d028366a3738cd700230 SHA-256: 4f33c44fe7326a726508fc2465d5c9a93745e499004dde924a22298c1c3e61d5
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains a large number of external links, identified as a link farm. The primary URL, 'https://traffine.ru/strik?utm_term=lol+bedava+%25C5%259Fampiyon+alma', suggests a potential phishing or SEO manipulation attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware.

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://traffine.ru/strik?utm_term=lol+bedava+%25C5%259Fampiyon+alma PDF link annotation
    • https://mipoxijal.weebly.com/uploads/1/3/4/7/134709746/soxete_ladevagupazam.pdfIn PDF document text
    • https://jitebemaduk.weebly.com/uploads/1/3/4/6/134692965/nixusilamevenavanel.pdfIn PDF document text
    • https://penuwepilaxol.weebly.com/uploads/1/3/4/7/134756509/4641938.pdfIn PDF document text
    • https://gupupekulumo.weebly.com/uploads/1/3/4/1/134108922/pugopalowipi_xuzemifup_baxetanite_ferivupaza.pdfIn PDF document text
    • https://zugozoriv.weebly.com/uploads/1/3/4/7/134770463/navaronak-sobamunesobax-fovevoregikewe.pdfIn PDF document text
    • https://wewiwefiwowofaj.weebly.com/uploads/1/3/4/3/134369931/1387686.pdfIn PDF document text
    • https://zeteleginogegop.weebly.com/uploads/1/3/4/5/134526156/jetetawen-lodexuw-xawapevakumar-nuginukis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/53493854894.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24346f52-0752-47c7-9ad5-a800f5b84c6a/cast_of_resident.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/98946351966.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/18276220945.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cab8bd73-4891-4731-abcc-58c7d1b7562e/zelizolerigevozilabop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f33b50a0-b164-4888-8844-a1e237c4110a/96758308035.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF610 5320 bytes
SHA-256: 2e0e813b4711c212f137883da7cd9faa323707217f55f7aff6b49839662829c1
font_01_sfnt_off0001081f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081F 12480 bytes
SHA-256: 91d47e775426651497e4b6abf773fa9ddd84dbb9ac2be6cb425b24ac8f43d02e

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