Malicious PDF — malware analysis report

Static analysis result for SHA-256 55af0b712f936b18…

MALICIOUS

PDF

67.2 KB Created: 2020-12-29 21:57:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: e3bdfe7a87c4aff9544be91dba9655a5 SHA-1: bd4d0b36243fd5f3ab26633e70688aeeb64a0fba SHA-256: 55af0b712f936b18ed0fdcf3d558f02c58eac4237a42d6b75fd92adac1779190
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external links, many hosted on disposable domains, suggesting an attempt to redirect users to potentially malicious or phishing sites. The presence of embedded URLs and the PDF structure strongly indicate a phishing or SEO manipulation attack.

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
  • 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://trafftec.ru/strik?utm_term=tiki+taka+barcelona+youtube PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379379/normal_5fae3d03cf09c.pdfIn PDF document text
    • https://vubosetupis.weebly.com/uploads/1/3/4/5/134594606/859a6b3174e04.pdfIn PDF document text
    • https://cdn.sqhk.co/jawutuwek/idijjhz/viridiana_alatriste_funeral.pdfIn PDF document text
    • https://sokijotebeveme.weebly.com/uploads/1/3/4/7/134767098/nadilan.pdfIn PDF document text
    • https://biwurozijusuxux.weebly.com/uploads/1/3/4/7/134724143/piratojamuje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409122/normal_5f96c7b700304.pdfIn PDF document text
    • https://favasonod.weebly.com/uploads/1/3/2/7/132740296/8521618.pdfIn PDF document text
    • https://wibakaxidame.weebly.com/uploads/1/3/2/7/132741334/zoxawi_daridejokavomux_mimufemujig.pdfIn PDF document text
    • https://regafuraseni.weebly.com/uploads/1/3/4/6/134663643/2853809.pdfIn PDF document text
    • https://dineretisa.weebly.com/uploads/1/3/4/7/134709889/zisokukitevuriti.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwumixe/X2EDGij/38653584617.pdfIn PDF document text
    • https://xitonodulamet.weebly.com/uploads/1/3/4/3/134307836/992514.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457011/normal_5fc99044670ed.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/divexikav/autobot_arcee_transformer.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_off0000cacd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCACD 4868 bytes
SHA-256: 6e179c408e72ce6d9406395d223f67f3415d3f70dcdd94ee91567af4987c75e5
font_01_sfnt_off0000db79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB79 10796 bytes
SHA-256: f62fc7c77216f890a767ad3238f9494ac5b512fbb884405df45810990515c645

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