Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cabfe770f6ef043…

MALICIOUS

PDF

78.7 KB Created: 2021-05-14 00:03:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 16c67c039ae521ea6deb3e4c3aaadb51 SHA-1: 97462618223c145baa305c449f32aff5c3c9be54 SHA-256: 6cabfe770f6ef043879aa635f25b4d756381cf1d60000a517646f5d9a044f8f7
244 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing trojan. It contains a large number of embedded links, many pointing to disposable hosting, suggesting a link farm or phishing campaign. One critical heuristic indicates a link to known malicious redirector infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://yafferge.ru/strik?utm_term=how+to+connect+panasonic+tv+to+sky+remote In PDF document text
    • https://xikagarema.weebly.com/uploads/1/3/4/4/134489929/3489086.pdfIn PDF document text
    • http://jowivuv.22web.org/wizoxowumuxiku.pdfIn PDF document text
    • https://cdn.sqhk.co/lasozigur/najagic/video_online_copy_url.pdfIn PDF document text
    • https://febodume.weebly.com/uploads/1/3/2/8/132815732/wufovoxufuzaxezu.pdfIn PDF document text
    • https://wasoxojeroxinab.weebly.com/uploads/1/3/4/8/134888233/8689275.pdfIn PDF document text
    • https://sowexovaxulaxil.weebly.com/uploads/1/3/4/8/134892082/c25fe2e5e.pdfIn PDF document text
    • https://gojenejanoz.weebly.com/uploads/1/3/0/7/130739654/sidirozowoguzave.pdfIn PDF document text
    • https://peziwotikiju.weebly.com/uploads/1/3/4/6/134602895/tavexekud.pdfIn PDF document text
    • https://sukaxivex.weebly.com/uploads/1/3/4/8/134895869/73ba657d7cd.pdfIn PDF document text
    • https://cdn.sqhk.co/joxipadij/ajejhar/muppet_puppets_for_sale.pdfIn PDF document text
    • https://gotizede.weebly.com/uploads/1/3/2/6/132695714/9616593.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vefafovapekaxa.epizy.com/6426993979.pdfIn PDF document text
    • http://gejopap.rf.gd/angular_material_formarrayname.pdfIn PDF document text
    • http://pewozemiludex.rf.gd/42046623035.pdfIn PDF document text
    • http://filamejukak.epizy.com/dugikufanodivegajopadir.pdfIn PDF document text
    • http://lelekon.epizy.com/9632418548.pdfIn PDF document text
    • http://safinunel.epizy.com/solving_rational_functions_worksheet.pdfIn PDF document text
    • http://vunowowino.epizy.com/78513895208.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_off0000f65c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF65C 5328 bytes
SHA-256: 446419877fb360ec9706e43b83e6ddc931e4b58b22e71d371309beffc3f23db3
font_01_sfnt_off00010883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10883 10892 bytes
SHA-256: 0d45549bf0be216b494d3c8be3fb4fa4d68ebf0534b8eba4c17efe22f1057b0b

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