Malicious PDF — malware analysis report

Static analysis result for SHA-256 97fd9876d31ccdab…

MALICIOUS

PDF

76.1 KB Created: 2021-03-12 13:38:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 59854b1bcfd80946d1756145572e4bf4 SHA-1: 74a9fb0183ae686e88152f056a6c709e9c2a9677 SHA-256: 97fd9876d31ccdab692b1ceb0b75e8bad92bed410732484806105160f97a7523
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a common tactic for SEO manipulation or phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically flagging it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it's designed to redirect users to potentially malicious sites.

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://bologen.ru/wb?keyword=do%20tris%20and%20four%20stay%20together%20in%20allegiant%20movie PDF link annotation
    • http://ontrade.top/university_of_texas_zip_code_austinf9pkh.pdfIn PDF document text
    • https://wirevoge.weebly.com/uploads/1/3/1/8/131856771/45b0b2b04e05.pdfIn PDF document text
    • http://bumefivaloso.scienceontheweb.net/wisunax.pdfIn PDF document text
    • http://br1.red/diwixepuz9709.pdfIn PDF document text
    • https://senekuzoje.weebly.com/uploads/1/3/5/9/135978249/kirerunusoliz.pdfIn PDF document text
    • https://fofosefekilom.weebly.com/uploads/1/3/0/8/130813764/6404548.pdfIn PDF document text
    • https://cdn.sqhk.co/gasubapo/Ggjjao3/run_run_rudolph_5k_results.pdfIn PDF document text
    • https://cdn.sqhk.co/bopibege/OQa1Ghd/business_english_games.pdfIn PDF document text
    • https://vofitikasu.weebly.com/uploads/1/3/1/8/131871658/zebapiferakukuj.pdfIn PDF document text
    • https://funoridarudaru.weebly.com/uploads/1/3/5/3/135304061/1397244.pdfIn PDF document text
    • http://jilavixit.medianewsonline.com/environmental_impact_assessment_case_study_examples_in_india.pdfIn PDF document text
    • https://vixeweno.weebly.com/uploads/1/3/6/0/136049701/c0c287033df8fd.pdfIn PDF document text
    • https://cdn.sqhk.co/jekefebiba/SVDujjz/zusirekasozadenugejabo.pdfIn PDF document text
    • https://cdn.sqhk.co/dikulodut/VigNz92/43990582681.pdfIn PDF document text
    • https://cdn.sqhk.co/gebemiwisero/hgfggqF/rujibafovuwadoluto.pdfIn PDF document text
    • https://pobolibawawo.weebly.com/uploads/1/3/1/4/131437087/a250b96d.pdfIn PDF document text
    • http://femonejigajape.mywebcommunity.org/miss_peregrine_home_for_peculiar_full_movie_in_tamil_download.pdfIn PDF document text
    • https://cdn.sqhk.co/pefisemise/jig2Yjf/xunolizeba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://livirava.atwebpages.com/97610202539.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_off0000ec34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC34 5480 bytes
SHA-256: 71cbb35af0eb37254d7b14873997d3790bc8b9dbf60ced39c943f364f94f2a1d
font_01_sfnt_off0000fec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC5 10492 bytes
SHA-256: 3b949656b2432df2ce534286ae91310f2790d1a6be71fe8f1d0a7867fd03d5a7

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