Malicious PDF — malware analysis report

Static analysis result for SHA-256 3569ebde4a3e0d89…

MALICIOUS

PDF

69.6 KB Created: 2021-01-04 03:34:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d18b3b1ca40de76db65752425a232f09 SHA-1: 98f4c2027f4beee5c9452f577cfe05dac9d21686 SHA-256: 3569ebde4a3e0d89dfe0f4f817b364d54d83efab1a76ae9af3feb78d6dee91bb
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics and an ML classifier as malicious, specifically as a phishing or SEO link farm. It contains numerous external links, with a critical heuristic identifying a mass of external PDF links, suggesting an attempt to manipulate search engine results or direct users to malicious content. No scripts were extracted, but the presence of many external URLs indicates a likely phishing or SEO spamming attack pattern.

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 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://traffine.ru/123?utm_term=identifying+theme+2+answers PDF link annotation
    • https://joruluzadazalit.weebly.com/uploads/1/3/4/6/134673717/28746dbd0.pdfIn PDF document text
    • https://cdn.sqhk.co/zatugudaxaji/jdnnXr4/fajugopu.pdfIn PDF document text
    • https://zejuvuvegodefi.weebly.com/uploads/1/3/1/4/131453892/ziduvataxazix.pdfIn PDF document text
    • https://fevuvewuvadudu.weebly.com/uploads/1/3/4/6/134650824/fibujiropido.pdfIn PDF document text
    • https://lonamejekewow.weebly.com/uploads/1/3/5/3/135396766/tujobowiwumeje-bifutizade-nazilunusisaf-dukaxokegod.pdfIn PDF document text
    • https://gesoroserazam.weebly.com/uploads/1/3/4/3/134310447/2397064.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376598/normal_5fdf5743b0ff9.pdfIn PDF document text
    • https://cdn.sqhk.co/zowipitilo/fhahgyL/lurezibufogoloso.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://s3.amazonaws.com/kewakuko/anxiety_disorder_test.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/beyond_synonym_formal.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/everfi_renting_vs_owning_quiz_answers_quizlet.pdfIn PDF document text
    • https://s3.amazonaws.com/widetunipet/ibm_automation_anywhere.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_off0000c604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC604 5232 bytes
SHA-256: 20aa3294b355a636dd2624effdbd2cefde1153c20fa6c7fee3780c41b6e1b714
font_01_sfnt_off0000d7a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A4 10564 bytes
SHA-256: fa1258215cc4c4e39e1ca68ba3c87f49daa3f783d0127901776f4163deeac56b
font_02_sfnt_off0000fbc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC0 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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