Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bcebd0050497b8d…

MALICIOUS

PDF

75.3 KB Created: 2020-11-26 06:17:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 9a8fd1d1921cbb8c5d51b901a95a3d3a SHA-1: d0fe1b81d5b17a4967b9448db29103bd09a850ff SHA-256: 7bcebd0050497b8dfe3e103c25d833283ff40fc41dd12d7a44939d3c6f3d7766
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The primary URL, 'https://traffnew.ru/strik?utm_term=black+and+decker+lawn+mower+charger', appears to be a lure for users searching for a specific product, likely leading to phishing or malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffnew.ru/strik?utm_term=black+and+decker+lawn+mower+charger PDF link annotation
    • https://siveruvamavekug.weebly.com/uploads/1/3/4/2/134266289/kiligakopot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393197/normal_5fb7da81ef398.pdfIn PDF document text
    • https://dudepemak.weebly.com/uploads/1/3/4/7/134702006/5101ceaf2ffe09c.pdfIn PDF document text
    • https://lafawifovetin.weebly.com/uploads/1/3/4/3/134369932/binokumizeweg.pdfIn PDF document text
    • https://jasixuruvixu.weebly.com/uploads/1/3/4/2/134234618/xuromulu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367268/normal_5f92274de89ab.pdfIn PDF document text
    • https://palozemoxapido.weebly.com/uploads/1/3/4/3/134366311/5010193.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/08477f7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376087/normal_5f8c5b8a9d32e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405437/normal_5f9ad7569867f.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/68db4360-7728-4f3d-951b-dddb24eea622/tratado_de_pediatria_sbp_4_ediC3A7C3A3o.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ce901a6-205b-4cc4-80a9-4fcf2042b525/27071025602.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/125686f0-0577-43b4-bb15-e107b518b42a/peferoda.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_off0000e8f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F9 5380 bytes
SHA-256: da0a912acf634f44f2da1498b475a85164df618cad525a4df3f214707dd08d80
font_01_sfnt_off0000fb32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB32 10868 bytes
SHA-256: d6d91390e4c6e34915c1216770a32b16d991b1b9672869d23b918d09e6b1cae3

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