Malicious PDF — malware analysis report

Static analysis result for SHA-256 56572124dd730dfa…

MALICIOUS

PDF

69.4 KB Created: 2021-06-07 07:02:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b3de2400d43526e3065e7c148088ed70 SHA-1: ce8c1e68e957c02c6d69d1452dd7eb23db7674f2 SHA-256: 56572124dd730dfadb1eef1d24c86374459868d297813bce50efcb82fc2bf467
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://irlanc.ru/pbw?utm_term=surf+servers+csgo+knife PDF link annotation
    • https://tusunupo.weebly.com/uploads/1/3/4/5/134507020/tujaru.pdfIn PDF document text
    • https://kelonefak.weebly.com/uploads/1/3/2/6/132683111/kebulirot.pdfIn PDF document text
    • https://pifeposanitu.weebly.com/uploads/1/3/4/7/134753567/789b5c8d.pdfIn PDF document text
    • https://bojotipawotos.weebly.com/uploads/1/3/2/6/132681617/jegilalufivofapowepu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387711/normal_603231a3dc050.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408481/normal_60bd3ab33eb11.pdfIn PDF document text
    • https://jipuziloki.weebly.com/uploads/1/3/2/6/132695969/d55291184.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456420/normal_60421854593db.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478928/normal_5fc69edfceb95.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368962/normal_5fdd1e7e76cef.pdfIn PDF document text
    • https://vozexipazaxa.weebly.com/uploads/1/3/4/4/134444785/lemurazilelokulov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444370/normal_60474abdcebf4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387816/normal_5ff0e3a1228fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405902/normal_5fe881c923ef7.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/9e11bbaa-de82-4716-812a-d5190783931d/47402846191.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bcd6a91-0c86-4954-917b-9f7ba3a20cc3/37535274928.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f2fe137-bb39-458b-921f-cd4cf822f109/samsung_grand_prime_case_red.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59a2c8f4-7b5a-4890-9fb5-c15feb799cd3/adverbs_and_adjectives_exercises_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edb12829-8156-48df-973d-277b2e64f8ad/how_to_pair_jaybird_freedom_sprint.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf9e9251-b254-4c3c-9e84-133f087c7e44/are_ikea_kitchen_doors_standard_size.pdfIn PDF document text
    • https://forums.alliedmods.net/showthread.php?t=2In 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_off0000d329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD329 5032 bytes
SHA-256: f8adea64bb49fe152ae28458b08bb147b981886378b6023a394689920a88ada7
font_01_sfnt_off0000e46d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE46D 10712 bytes
SHA-256: c10e6bdd41603b29a9e5f8902f979ba31d1738c101520af2396eba893a3bd0a9

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