Malicious PDF — malware analysis report

Static analysis result for SHA-256 30102ba5b4933e79…

MALICIOUS

PDF

78.0 KB Created: 2021-02-14 06:57:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 5d89772677f98e91288c4dad071ac2b5 SHA-1: e0c97c583414d2568d945f439772d07073d01a17 SHA-256: 30102ba5b4933e79d7b3e3e95881a8038c8169bcab1dafb071f67e169179e4fb
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' pointing to a potential malware download. The ML classifier and ClamAV detection strongly indicate malicious content. While no scripts were directly extracted, the PDF structure and heuristics suggest it's designed to redirect users to malicious sites, likely for phishing or malware distribution.

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://crophysi.ru/wb?keyword=beginner%20clarinet%20sheet%20music%20pdf%20free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4483624/normal_600fb354838f0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495685/normal_5fcc2178a1cf3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481163/normal_5ff40dc471a38.pdfIn PDF document text
    • https://cdn.sqhk.co/jujejorule/btKq3hc/planet_der_affen_survival_auf_netflix.pdfIn PDF document text
    • https://femuketidoxesi.weebly.com/uploads/1/3/3/9/133997502/3537134.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476782/normal_601493d45084b.pdfIn PDF document text
    • https://tererenigi.weebly.com/uploads/1/3/1/4/131405956/5273401.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424632/normal_5ff524335a6da.pdfIn PDF document text
    • https://cdn.sqhk.co/fumamimed/aegajbi/computer_science_journal_impact_factor_2019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384634/normal_600381486f297.pdfIn PDF document text
    • https://kozewililusu.weebly.com/uploads/1/3/4/0/134013002/699eb.pdfIn PDF document text
    • https://cdn.sqhk.co/bufutoje/hWggie8/escape_corporation_room_escape_game_berlin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405687/normal_6007e5782895f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375073/normal_5fe3e420d619c.pdfIn PDF document text
    • https://cdn.sqhk.co/powirafawume/Bhb8hig/archery_target_block_academy.pdfIn PDF document text
    • http://kisedevobale.22web.org/94109745192.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nifiloxoburufi.rf.gd/bokuxirelagixixabuvu.pdfIn PDF document text
    • https://s3.amazonaws.com/fonibinaraj/kurukshetra_university_exam_date_sheet_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/vudelorimixon.pdfIn PDF document text
    • https://s3.amazonaws.com/somisilegex/77245421902.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/linear_permutation_problems_with_solutions_and_answers.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_off0000f1e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E6 5616 bytes
SHA-256: e49c11fd90519d5d55da0ddca81423f282a8e24be720fa8814589fde69607c3e
font_01_sfnt_off000104d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D8 11108 bytes
SHA-256: ffd759747c205e483e7db16186780cd4d9dbb711decc71f7b1f9548718015c7f

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