Malicious PDF — malware analysis report

Static analysis result for SHA-256 afa5eede35f52abd…

MALICIOUS

PDF

76.6 KB Created: 2021-05-30 20:05:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0fd7e4699672eeaabead211b02e10b86 SHA-1: 7170ef1c28ce378b15ab6c56aa5fd99ef592c2ba SHA-256: afa5eede35f52abd1ce6a20e41978685b9437a30644262cfb587ccb9bc412310
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 multiple heuristics and an ML classifier, specifically flagged as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The embedded URLs likely lead to malicious content or phishing sites.

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://fokemale.ru/123?utm_term=asterix+and+obelix+vs.+caesar%2528+1999 PDF link annotation
    • https://gefererasixo.weebly.com/uploads/1/3/4/7/134749514/rolif.pdfIn PDF document text
    • https://weziriditovi.weebly.com/uploads/1/3/4/1/134108838/a97a9.pdfIn PDF document text
    • https://lefagetali.weebly.com/uploads/1/3/2/3/132302894/gavixamofolubeleni.pdfIn PDF document text
    • https://jemewifawoboxe.weebly.com/uploads/1/3/4/8/134872293/bea0669aaf.pdfIn PDF document text
    • https://ligofaxudatejot.weebly.com/uploads/1/3/0/7/130739538/kazevawofozu.pdfIn PDF document text
    • https://vusesuke.weebly.com/uploads/1/3/4/7/134723580/4542751.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460255/normal_6069f9f6d852d.pdfIn PDF document text
    • https://varudigenaka.weebly.com/uploads/1/3/4/5/134597471/2f77d2157a0d08.pdfIn PDF document text
    • https://lezogujivezubix.weebly.com/uploads/1/3/4/8/134878846/4535568.pdfIn PDF document text
    • https://bibasalerudo.weebly.com/uploads/1/3/1/8/131857029/8172925.pdfIn PDF document text
    • https://bepixumute.weebly.com/uploads/1/3/5/3/135302933/1117291.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489056/normal_6029034ea003b.pdfIn PDF document text
    • https://vakurizilobiwil.weebly.com/uploads/1/3/0/9/130969742/xadop.pdfIn PDF document text
    • https://figotuzu.weebly.com/uploads/1/3/4/5/134579221/5111342.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417992/normal_6056188edfcb7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a215bcb4-0cd4-439d-8588-4fb4f0e23192/where_was_the_miseducation_of_cameron_post_filmed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4293acf-1d0a-448b-a49a-733960eed130/how_to_add_watermark_on_image_in_wordpress.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c75ef675-a5b7-48f9-a8de-d995c54a815a/44906924354.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_off0000ec8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8D 5508 bytes
SHA-256: 2d082dfa7bf1c0ac88e4c5d30af8bf7ff8de06da0c4522bd5a47bc6bc4ea211f
font_01_sfnt_off0000ff6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6E 11312 bytes
SHA-256: 616ee0e4aa290f5a7d436bad6590a084d061aad11488778e1c1c5aec875b8ab8

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