Malicious PDF — malware analysis report

Static analysis result for SHA-256 25a8a6a442a91681…

MALICIOUS

PDF

75.1 KB Created: 2021-06-14 13:04:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 99d9ab39bd22dea78ba8682eb2d81de1 SHA-1: 534718430a1652662b8d2beb487088bf783dc1ac SHA-256: 25a8a6a442a916819f56cfb722f8a0a4a8a19e3381a8ecea909e30353bdddf86
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically referencing 'salesforce+lightning+email+template+signature', suggesting a phishing lure. Heuristic analysis indicates the PDF is a link farm hosted on disposable domains, and ClamAV detected it as a phishing trojan. Although no scripts were explicitly extracted, the PDF structure and embedded URIs strongly suggest malicious intent, likely to redirect users to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://leonvi.ru/123?utm_term=salesforce+lightning+email+template+signature PDF link annotation
    • https://rororejiwep.weebly.com/uploads/1/3/5/9/135966539/70f1c24e269035b.pdfIn PDF document text
    • https://logugutixolug.weebly.com/uploads/1/3/5/3/135393325/vovosivinapo-meperadodu.pdfIn PDF document text
    • https://riderasal.weebly.com/uploads/1/3/0/7/130738784/komerufexexilo.pdfIn PDF document text
    • https://manasuma.weebly.com/uploads/1/3/0/8/130873954/5718241.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lakiluxodev.pbworks.com/w/file/fetch/145045548/download_dragon_ball_z_tenkaichi_tag_team.pdfIn PDF document text
    • http://kalejesezuda.pbworks.com/f/nitewotezunosarapebuw.pdfIn PDF document text
    • http://nekimijazom.pbworks.com/f/school_attestation_letter_sample.pdfIn PDF document text
    • http://sodopateduke.pbworks.com/w/file/fetch/145089192/26362985887.pdfIn PDF document text
    • http://pikalunik.pbworks.com/f/mijeduzikomojinepujoti.pdfIn PDF document text
    • http://lakiluxodev.pbworks.com/w/file/fetch/145047768/66410566380.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7cf2319-cb6f-411e-b22d-13fa24ff0d42/74646538253.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab6a43ca-b5c2-4033-ba30-f47be09dd85a/ejercicios_de_algebra_relacional_resueltos.pdfIn PDF document text
    • http://tisowowuduwe.pbworks.com/w/file/fetch/144557580/85956794284.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af51c992-3b02-4424-8fcc-b0650958bc7b/liftmaster_security_plus_2.0_wireless_keypad.pdfIn PDF document text
    • http://nixefijevumu.pbworks.com/f/godafufumufapudesupale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c2db0da-17fc-42c8-8ffa-5502e7d974b1/financial_due_diligence_report_template.pdfIn PDF document text
    • http://damopijos.pbworks.com/w/file/fetch/144523353/jojelomawuxagewitiroz.pdfIn PDF document text
    • http://gedelageke.pbworks.com/w/file/fetch/144889335/44545566516.pdfIn PDF document text
    • http://dateromitu.pbworks.com/f/download_game_drastic_ds_emulator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/428feabf-c7d1-456f-9299-efa40d9353a1/19789804414.pdfIn PDF document text
    • http://zawepiko.pbworks.com/f/67897690292.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_off0000e6c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C3 5532 bytes
SHA-256: 7b8fb035bd7256067b03c9707ab1af5082725ae4dd9d29f819fc48853b6b5123
font_01_sfnt_off0000f967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF967 11072 bytes
SHA-256: 31b40da3c973b0f97a855ea97f76e2690221b71f1704cc37dab44b82da4a99ce

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