Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fa02475cae62e5f…

MALICIOUS

PDF

87.2 KB Created: 2021-01-12 14:41:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: d9f1c7f7b2f48216e0ffc35a11fc917f SHA-1: 34bc1616409e79c88615d380e3f780308e0b0743 SHA-256: 6fa02475cae62e5f19a1a284ff663d8f8b5029c6cb9c1d8bbfb74ac795f1544e
244 Risk Score

Malware Insights

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

The PDF contains a large number of links to external websites, many of which are hosted on disposable domains and point to potentially malicious redirectors. The ML classifier and ClamAV heuristic strongly indicate maliciousness, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/aws?utm_term=avenue+supermarts+annual+report+2018 In PDF document text
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/a86ef7.pdfIn PDF document text
    • https://xemakoxen.weebly.com/uploads/1/3/4/3/134320116/buxebibaja-bituvix-leraf.pdfIn PDF document text
    • https://vizodifoberesin.weebly.com/uploads/1/3/4/9/134900429/pemafutufexiba_nerodezepexadem_wamezevekana.pdfIn PDF document text
    • https://nodokesomizi.weebly.com/uploads/1/3/4/6/134656280/redamine-deziledetivalu.pdfIn PDF document text
    • https://tumixivig.weebly.com/uploads/1/3/1/6/131636813/6439391.pdfIn PDF document text
    • https://mifadumuvuvog.weebly.com/uploads/1/3/4/6/134689338/2859717.pdfIn PDF document text
    • https://xasigevas.weebly.com/uploads/1/3/4/5/134595911/tivenev.pdfIn PDF document text
    • https://runebipunozup.weebly.com/uploads/1/3/1/4/131406604/punaxagavibo.pdfIn PDF document text
    • https://migirebunimalab.weebly.com/uploads/1/3/1/3/131383914/navojugogefal.pdfIn PDF document text
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/keporobore.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/sigad_kudogerulari_gotowelaner.pdfIn PDF document text
    • https://xebezadewa.weebly.com/uploads/1/3/4/8/134852362/tesaribuxap.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/fatisake/66706278055.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/ammonium_formate_pka.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00011bd1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11BD1 28676 bytes
SHA-256: ba2ed6b0d2172509cabb9662c44ad2a919b22c37d1ff23c24b2c499a3bc9f3df
font_00_sfnt_off0000e490.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE490 5532 bytes
SHA-256: 1d3305f6d6a72e51b5bfe1d04eb90c31bc61f30bc813ac93f5c7ef79e56afbdd
font_01_sfnt_off0000f74c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF74C 10660 bytes
SHA-256: 059c02c843696a726f67edb98d75db06d07a9389f75e1aff6c68fb6d21ede6fb

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