Malicious PDF — malware analysis report

Static analysis result for SHA-256 60fa5a2269001f70…

MALICIOUS

PDF

83.0 KB Created: 2021-02-01 14:41:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: ec8f677ee75f60ec5b7c4f69784f755b SHA-1: 6b2ccb3207d65224e5f792c7872bdc49a89be102 SHA-256: 60fa5a2269001f701d0e960336a130b2a2a8660a033b5eed2cd8c71ce0df522f
156 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 0.9998

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://bologen.ru/123?utm_term=fridays+gluten+free PDF link annotation
    • http://nujokopinud.iblogger.org/nowipuweporazukalo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417205/normal_5fee4c511f928.pdfIn PDF document text
    • http://drilltech.info/topup_africa_app_download2d73h.pdfIn PDF document text
    • https://maselevajaf.weebly.com/uploads/1/3/1/3/131398143/d7ae8cd2ab2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465690/normal_5fe1147b5bb05.pdfIn PDF document text
    • https://sokirokesavosa.weebly.com/uploads/1/3/4/9/134901907/nurunorolusip.pdfIn PDF document text
    • http://lomags.ru/server_remote_access_toolsar7gy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380869/normal_5ffb6630117e4.pdfIn PDF document text
    • https://luludosob.weebly.com/uploads/1/3/4/7/134703274/kupobog.pdfIn PDF document text
    • http://romabeveseruzor.22web.org/afcat_2_answer_key_2018.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vopapokolozanum.rf.gd/nisd_affidavit_of_residence_form.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/warumudegefarezop.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/robamaroli.pdfIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/cardiac_anatomy_and_physiology_worksheet_answers.pdfIn PDF document text
    • http://nijetazum.epizy.com/ambala_movie_full_hd.pdfIn PDF document text
    • http://vekagurose.rf.gd/dailymotion_video_er_online_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/best_ad_blocker_for_android_root.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/huskyct_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/96027383002.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_off00010a0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A0C 5132 bytes
SHA-256: 63a162043094c0fc71fcb1e18ac10d666d878993fb0fa21c7eb6b3b5d7f0744d
font_01_sfnt_off00011b9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B9F 10244 bytes
SHA-256: f89d3480f0f073cef9cb09ffed15be1c47b51959a56d43ec8ec5e663d2bc79db

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