Malicious PDF — malware analysis report

Static analysis result for SHA-256 0241a2c06bedfbb7…

MALICIOUS

PDF

79.0 KB Created: 2021-06-02 10:23:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 329ec9197ffec3a96655b777b46f2669 SHA-1: 5325c7a88e626bf460b42d56e0653992deb792ba SHA-256: 0241a2c06bedfbb7f0aabefa4e92b6112d33b3fd2e553abe648e2246076bcf52
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://archism.ru/pbw?utm_term=lowen+ejercicios+de+bioenergetica+pdf PDF link annotation
    • https://fepexugoroba.weebly.com/uploads/1/3/4/4/134469665/489768df4e6aa.pdfIn PDF document text
    • https://salabupomisopef.weebly.com/uploads/1/3/4/6/134631393/5762b9f39f.pdfIn PDF document text
    • https://wenutezow.weebly.com/uploads/1/3/5/4/135400756/mexagu-lemerafawakif.pdfIn PDF document text
    • https://wuwawumakilur.weebly.com/uploads/1/3/4/8/134875279/sarag-lexudaf-genuxij-sisadereleb.pdfIn PDF document text
    • https://pafasuletelaw.weebly.com/uploads/1/3/4/4/134447528/9045331.pdfIn PDF document text
    • https://popoxalisasuper.weebly.com/uploads/1/3/0/7/130775362/notogezag.pdfIn PDF document text
    • https://miwidikanizi.weebly.com/uploads/1/3/4/0/134016908/cbcd3a3b25d5ab1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473916/normal_5fe2bfbe5a4ad.pdfIn PDF document text
    • https://jitugitux.weebly.com/uploads/1/3/0/7/130740190/eb5c9150ecb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413713/normal_6043ebdaef9ec.pdfIn PDF document text
    • https://xafadatez.weebly.com/uploads/1/3/4/4/134478609/pajafi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491670/normal_6008950070505.pdfIn PDF document text
    • https://loxutagunepolu.weebly.com/uploads/1/3/4/7/134763456/ddc0c61f652.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390659/normal_606686ee01a98.pdfIn PDF document text
    • https://vipavogezeguw.weebly.com/uploads/1/3/1/0/131069860/1069487.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kiletejude.pbworks.com/w/file/fetch/144411588/how_to_reset_sinotec_tv_without_remote.pdfIn PDF document text
    • http://munonoraze.pbworks.com/f/kipora.pdfIn PDF document text
    • http://xojipoxar.pbworks.com/f/best_book_for_learning_c_programming.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cf5a576-cd18-4305-8a2b-71bdd8f52368/guruzipijakixumatibek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25be99e0-ad50-4ca0-afec-bda1c2b960b0/best_lock_pick_for_padlocks.pdfIn PDF document text
    • http://vedufid.pbworks.com/w/file/fetch/144496065/how_to_level_up_faster_in_idle_heroes.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_off0000f49d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF49D 5540 bytes
SHA-256: 909dd69cff06cb5a687dbacb252dc94986b9ab8ec87911ba428050d4173742dc
font_01_sfnt_off0001079b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1079B 11640 bytes
SHA-256: 699b8bc64e04ba22d841c40a8054dce99e5c49088b670b02db45be8282494ed5

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