Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5372ce2d3a1ae04…

MALICIOUS

PDF

90.1 KB Created: 2021-06-04 14:34:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 5dd0971cc6926d759a3fa5181d88c6dc SHA-1: ddbc1e3534d371ae494e411465f0a7ec1223217b SHA-256: e5372ce2d3a1ae045404ff31c673b2dd39d8d1da7586988c5feb1ad8df109d05
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting services, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a phishing or malicious redirection attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://archism.ru/pbw?utm_term=diccionario+biblico+vine+gratis PDF link annotation
    • https://zexexoxanevekig.weebly.com/uploads/1/3/4/6/134672397/gexaduxenisazoj.pdfIn PDF document text
    • https://runonidalebemi.weebly.com/uploads/1/3/2/6/132682230/8161786.pdfIn PDF document text
    • https://gawaratanos.weebly.com/uploads/1/3/4/3/134339439/9923856.pdfIn PDF document text
    • https://bipokedofep.weebly.com/uploads/1/3/5/3/135322207/4182969.pdfIn PDF document text
    • https://kigodebilak.weebly.com/uploads/1/3/5/2/135297846/jekerutisaram.pdfIn PDF document text
    • https://lawejuja.weebly.com/uploads/1/3/0/7/130740077/8353483.pdfIn PDF document text
    • https://jojimixumomural.weebly.com/uploads/1/3/4/4/134438106/fumiwubop.pdfIn PDF document text
    • https://liwojugimigazip.weebly.com/uploads/1/3/4/9/134904469/xarifipugore.pdfIn PDF document text
    • https://xitodilizunew.weebly.com/uploads/1/3/4/1/134108755/99e20aa55c3.pdfIn PDF document text
    • https://ritefebeg.weebly.com/uploads/1/3/5/3/135316582/jofivu.pdfIn PDF document text
    • https://vesanalu.weebly.com/uploads/1/3/1/4/131482823/lunedisekazenez.pdfIn PDF document text
    • https://numijiresib.weebly.com/uploads/1/3/4/6/134639859/zavowoxigixelu.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/0df21c04-876b-4a41-8b63-5be19d544665/how_to_be_in_shape_for_soccer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/356fa269-d8f6-4067-a78d-1888bc4df944/call_of_duty_modern_warfare_2_wallhack_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07c2b7e5-7b2e-4e6b-88d0-5fe4c743563b/howl_and_other_poems_pages.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e013294-5021-450a-ac50-eccacbb7e96d/4563185068.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d201dc8-a548-4b0c-9f2e-f475c3f37b3f/does_h2o_have_a_zero_dipole_moment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5fd5098-16a0-4630-9006-f1cac8fd4d06/dojerikonadojogamubepakun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6837564d-0d38-409e-a6ec-4575fcd7fcc6/what_do_you_do_with_empty_sodastream_canisters.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_off000112f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F3 4956 bytes
SHA-256: e280be06ee45f5668a40b0c84c80f55738726ca3bf13f010b0a84cfb93bbd7d1
font_01_sfnt_off000123d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123D7 12420 bytes
SHA-256: d44d1cbbabfbb1619872e899fc871cddef4ced8b9e775f9d1cab32331077a53a
font_02_sfnt_off00014b87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B87 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c