Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9f64260153412f7…

MALICIOUS

PDF

84.6 KB Created: 2021-02-28 04:23:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: dca3033e1f75069c417fd02322b533c0 SHA-1: 09663624b219983ab59d7f4b48a94dd8f9844255 SHA-256: d9f64260153412f754bd081ecd80157486fe4cba414faac45cc54adccb4ec3b4
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, including one that appears to be a link farm hosted on disposable infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest it is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/award?keyword=mordheim+warband+skirmish+possessed+guide PDF link annotation
    • http://agent-ritual495.online/voice_live_playoffs88d7h.pdfIn PDF document text
    • http://vipmanmarket.space/hearts_of_palm_what_do_they_taste_likeocv8j.pdfIn PDF document text
    • https://sokupime.weebly.com/uploads/1/3/3/9/133999930/0fb4866d1.pdfIn PDF document text
    • https://wamazuwo.weebly.com/uploads/1/3/1/3/131380988/3222337.pdfIn PDF document text
    • http://converstarget.ru/semowawa2wh.pdfIn PDF document text
    • http://testertumentum.space/puxakudisutzf1hp.pdfIn PDF document text
    • http://steelsho1.club/zunufunegerobezexumezewexxfy14.pdfIn PDF document text
    • http://rankingcoach-seo.com/tanokoranegutujulinotyw3p.pdfIn PDF document text
    • https://bopelesi.weebly.com/uploads/1/3/0/8/130874615/jeriletozarovumuzo.pdfIn PDF document text
    • http://bilkaita.space/love_simon_imdb_parents_guideos0g0.pdfIn PDF document text
    • https://cdn.sqhk.co/loganidob/jdhcjhO/steam_wallet_gift_card_walmart.pdfIn PDF document text
    • http://prizinsta.site/singapore_rail_map04ltw.pdfIn PDF document text
    • https://jatevabuxises.weebly.com/uploads/1/3/5/3/135382810/7d9d03.pdfIn PDF document text
    • http://juvozukatug.66ghz.com/assassin_s_creed_rogue_pc_free.pdfIn PDF document text
    • http://harmony-market.ru/57037774984cmp9u.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/kiwopusafize/35424765866.pdfIn PDF document text
    • http://tijiwef.epizy.com/21662344497.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/m67_details_of_relatives_form.pdfIn PDF document text
    • http://kososun.epizy.com/geramopag.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/difference_between_thematic_analysis_and_template_analysis.pdfIn PDF document text
    • http://keviful.epizy.com/57953542064.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_off00010d97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D97 5640 bytes
SHA-256: 47e2f877794d7c9c03fc309e55e95e1f5368aed9488556ec842297e3b9529b45
font_01_sfnt_off000120b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120B0 10504 bytes
SHA-256: 969b50a9fbfb270e2fbbb37e1a38f64903abd716ffccadd83fc838ff80bb8b60

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