Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0b5c5a0195da981…

MALICIOUS

PDF

72.9 KB Created: 2021-04-08 08:07:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 662e72553ca0f236d2ee4c3ccdabe9ba SHA-1: 2e0ce8766f9b98f798c0ad1975d81441026e7162 SHA-256: a0b5c5a0195da981f024f75ad09f23c9967af1d73bd7cbc3980e735651081e10
204 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to PDF files hosted on various domains, suggesting a link farm or redirector strategy. The presence of a 'free download' lure and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate a phishing or malware distribution attempt. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xezojetit.ru/strik?utm_term=exam+ref+70-483+programming+in+c%2523+2nd+edition+pdf+free+download PDF link annotation
    • https://xegokefizu.weebly.com/uploads/1/3/5/3/135323464/921f5.pdfIn PDF document text
    • https://bijigixeze.weebly.com/uploads/1/3/0/7/130739450/bokowodafep_lupulidas_mulej.pdfIn PDF document text
    • http://vobigivu.22web.org/cbre_annual_report_2016.pdfIn PDF document text
    • http://meetsalle.xyz/73543496125r4yqe.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/climbing_equipment_log_template.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/present_perfect_tense_exercises_with_answers_online.pdfIn PDF document text
    • http://naturaitalia.space/22105956708qo1d3.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/singer_sew_mate_5400_bobbin_winding.pdfIn PDF document text
    • https://cdn.sqhk.co/fujotojaxob/dihLggH/22374265326.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/30348780785.pdfIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/69841637110.pdfIn PDF document text
    • http://moymagazin.xyz/32300430327ublu3.pdfIn PDF document text
    • https://luresigixake.weebly.com/uploads/1/3/5/2/135294948/jisixidoko_ginirumom_vixaxo_vitiwadol.pdfIn PDF document text
    • https://cdn.sqhk.co/dojidavos/4hhijsa/calibria_crystal_guardians_reroll_guide.pdfIn PDF document text
    • http://webmastervlad.ru/is_indian_stock_market_open_on_christmas_dayriibe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fojeloga.rf.gd/abrsm_grade_8_piano_syllabus_2020.pdfIn PDF document text
    • http://dajajubofu.rf.gd/brill_s_encyclopedia_of_buddhism.pdfIn PDF document text
    • http://weweladegop.rf.gd/zugusifupiwexameferusit.pdfIn PDF document text
    • http://nupabumafe.epizy.com/google_chrome_apk_for_jio_phone.pdfIn PDF document text
    • http://fevejalamozek.epizy.com/39953322556.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_off0000d9e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E4 5852 bytes
SHA-256: aeb8e631e2ddcfd391e934261c9a63793fceaf71e073cbc4729872db822d31e1
font_01_sfnt_off0000eddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDD 11624 bytes
SHA-256: b4c273a8abe684f3c90ed7090f2d280aecce17c17a8c70c823450977866ef2cb