Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd6ba053bf518441…

MALICIOUS

PDF

68.1 KB Created: 2020-12-17 20:17:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 7403c5e9b5b0b00cbd6b6a66bee9fe56 SHA-1: 68092e192fd1a22a59c13c4acec331b585266982 SHA-256: fd6ba053bf518441f4c326d6e1eeff3bad3f86e28a8a7a1b5e68e707e86a4cfd
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, suggesting it is part of a link farm or SEO manipulation scheme, potentially leading to phishing or malware distribution. The presence of external URIs and a high number of embedded links points towards an attempt to redirect users to malicious sites.

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://traffking.ru/123?utm_term=cool+dog+collars+leather PDF link annotation
    • https://jaxedafotonomut.weebly.com/uploads/1/3/4/8/134885779/fuwenovanajase.pdfIn PDF document text
    • https://xezujexowesujol.weebly.com/uploads/1/3/4/5/134502134/74e54.pdfIn PDF document text
    • https://zoxamadafipezo.weebly.com/uploads/1/3/1/1/131164297/7904585.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376598/normal_5f9115471c568.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404959/normal_5f9dfc02c4f13.pdfIn PDF document text
    • https://tofojuduvebexaj.weebly.com/uploads/1/3/4/6/134650498/vapewaf-gikoworivem.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/toguvaju/mckesson_alcohol_prep_pads_sds_sheet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4c2c7acac6192ab7102d/1606372400913/verog.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/real_krusty_krab_restaurant.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/td_apps_online.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/30526134791.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf53f0173fb5383b991def/1606374385000/gibimewaposajujesasiwesof.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2953ad26ff1194f7e808d/t/5fc5bb153c6ccf69f3258ce3/1606794005834/latin_with_andy_henle_2.pdfIn PDF document text
    • https://s3.amazonaws.com/widetunipet/outlook_com_sign_in_page.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_off0000cc90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC90 5104 bytes
SHA-256: 38efd972df2a3c10e5fa84b1936ee4fe95ec6e38f3506e10bdd894c80fd3ad36
font_01_sfnt_off0000dde0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE0 11100 bytes
SHA-256: 12966f38207d185e32966174fa5162900424ba2a48b010405e44e487ec77cafd

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