Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bb95f3a028b063b…

MALICIOUS

PDF

67.5 KB Created: 2020-12-21 13:03:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: cd24fcd762dea3b519013483373caef7 SHA-1: 9fe9a5c824ae6974fb0b4d9adebb326a39e3ad07 SHA-256: 1bb95f3a028b063b7dbf80302ecab8dccfa01f6b0edd0f2b1fccfeb93ee988a5
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of external links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM'. The primary malicious URL, https://trafficel.ru/strik, is likely intended to redirect the user to a malicious site for further exploitation or phishing. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://trafficel.ru/strik?utm_term=battlevoid+harbinger+ship+unlock PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4426071/normal_5fceafba37510.pdfIn PDF document text
    • https://bubamixidik.weebly.com/uploads/1/3/4/6/134657394/rokiwatazebemud_nogupojunugaw_fiwoketogesoru_jonotu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365567/normal_5fab307a80be8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/nonos.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0cf3a5e8e827d428d5c84/t/5fd0edfd2d486834acb28e39/1607527934093/game_keys_free_steam_keys.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f59188e-5667-42ca-89ee-d4b966b5cf0d/18034597307.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc53225b8467722f1efea8f/t/5fc5e81d3570fb44d1cee6f2/1606805537218/rick_warren_bible_study_methods.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/human_anatomy_and_physiology_lab_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc9bbe50f46d6500014148/t/5fdd14ca77eeea0075b090fc/1608324298512/assembly_language_programming_of_8086_microprocessor.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1b6c78787e8798971b212/t/5fce9a5bfdebce1f9cef67d2/1607375452574/street_basketball_world_league_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/pemalovelipigase.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a05b68b-6c03-4b6b-9d4b-210475aad017/como_engaar_al_alcoholimetro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f8dfc04-e19d-4995-99d9-8bce64060ecc/instalar_moodle_en_xampp.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc29d8640f1034a5cb3e639/t/5fcb9b196e74d26c6f02140f/1607179034319/the_world_ends_with_you_switch_review_ign.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd58a43c-01b4-4f41-9b96-c41cd8b35dd9/44532179175.pdfIn PDF document text
    • https://s3.amazonaws.com/minegikukovel/projeto_alimentao_saudvel_ensino_fundamental.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_off0000c810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC810 5648 bytes
SHA-256: 6fdf2a5c17bfa6e2c44b1eff913a5230e031f2a23e1e8c3ed5fa9e5f643921c7
font_01_sfnt_off0000db40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB40 11056 bytes
SHA-256: 204c88781e03167d03ac29e5b027d588972914aab8df0c81f6c80bae062c5017

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