Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2c7534f17b2b141…

MALICIOUS

PDF

89.5 KB Created: 2021-06-04 17:24:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d7d811425754ac405f69d08f067206d1 SHA-1: ee2f12ecfaf979c42e4a7d92c55698cc0b153786 SHA-256: f2c7534f17b2b141377c36d3ab91a9d521050c5dea7ca290df83f68c7cc65025
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting it functions as a link farm. The embedded URL 'https://crewmak.ru/pbw?utm_term=which+agriculture+is+most+profitable' likely serves as a lure to direct users to this network of potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://crewmak.ru/pbw?utm_term=which+agriculture+is+most+profitable PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4482402/normal_603152b9bc47b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473926/normal_5ff4b2c20d7e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370985/normal_6024569986451.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445871/normal_604e33cf9e87f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451742/normal_6022e65663597.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418567/normal_604710ba937b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476416/normal_6014088250bbc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384152/normal_5ff42ac265965.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406481/normal_6009ee85a8237.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410201/normal_5fe72158106a8.pdfIn PDF document text
    • https://vonulimuwudepaf.weebly.com/uploads/1/3/4/1/134131723/534195.pdfIn PDF document text
    • https://faliroralomi.weebly.com/uploads/1/3/0/8/130874474/pixikanuxuli.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383918/normal_6008ebb7d7f1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368972/normal_6045f354b1f86.pdfIn PDF document text
    • https://xumizobizuzu.weebly.com/uploads/1/3/4/6/134688834/de52b249777ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413469/normal_6013a6b31d06a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487902/normal_5fd6510db7943.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/247a5b2a-b2ab-4ff6-9f19-042957a524cd/polk_n1_surroundbar_manual.pdfIn PDF document text
    • http://zeladejan.pbworks.com/f/dixidakowixuwapuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f4803b4-faaf-4c49-9ad1-9c8d33543c7c/what_is_an_ir_extender_cable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f64fcade-3f86-4f99-88be-ca7ad29c9797/full_logarithm_table.pdfIn PDF document text
    • http://vowujepojez.pbworks.com/f/josuwaja.pdfIn PDF document text
    • http://zopujoxobug.pbworks.com/f/niludit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4a4befe-43f7-4a9b-85af-4cf72da35c3d/how_to_install_hp_envy_4500_printer_on_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62a7a946-e7d3-4203-9326-d7879f899c57/34381210796.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000111ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111EF 5356 bytes
SHA-256: 1bbc94e6a74a7a83fa14a98a99e3ac4eaf0764562e10c5565c8d5814f1678c4c
font_01_sfnt_off00012432.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12432 10924 bytes
SHA-256: ab895690c2bfecc909bad09eb7c5eb45d06361b0b719a151dae238307a784a51
font_02_sfnt_off0001498c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1498C 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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