Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ffc34e1ebb1161e…

MALICIOUS

PDF

66.7 KB Created: 2021-01-26 02:11:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: b851ea79b37b485dc9c9df4db862f178 SHA-1: 561de0c58bf3bd2531659e36bb429217f17f395f SHA-256: 1ffc34e1ebb1161e0b821abc68f0d75c2e0b22084a043afb0556f846977e30f9
174 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which point to disposable hosting and are used in a link farm, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of a 'Password-protected archive handoff' heuristic suggests the document is designed to trick the user into downloading an encrypted payload, likely after providing a password.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • 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://traffnew.ru/square?utm_term=financial+needs+analysis+template+south+africa PDF link annotation
    • https://cdn.sqhk.co/gefimiwotux/thbjchd/xevek.pdfIn PDF document text
    • http://tiktokfrance.fun/dugijigerabapitisimexopa1vyq5.pdfIn PDF document text
    • http://vizionsmc.net/air_jordan_1_price_in_pakistancirgn.pdfIn PDF document text
    • https://giromazipudu.weebly.com/uploads/1/3/1/4/131453901/1914036.pdfIn PDF document text
    • http://muldwych.com/ixl_learningsearch_topics_and_skills_username_password_remember3klp3.pdfIn PDF document text
    • https://cdn.sqhk.co/jabuvilir/d7qjjwF/fiji_airways_a350_routes.pdfIn PDF document text
    • http://rerulekoba.66ghz.com/unit_conversions_worksheet_1_w314.pdfIn PDF document text
    • http://tewazezila.66ghz.com/cerato_sx3_2012_manual.pdfIn PDF document text
    • http://lolkek.xyz/warframe_limbo_prime_2020l4mea.pdfIn PDF document text
    • http://sun-italy.space/minecraft_new_nintendo_3ds_edition_updatebuj62.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zarusorujot.epizy.com/proform_225_cse_elliptical_trainer_reviews.pdfIn PDF document text
    • http://wivowutone.epizy.com/89883214851.pdfIn PDF document text
    • http://wuxojawe.epizy.com/all_information_about_ca_course.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_off0000c93c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC93C 5452 bytes
SHA-256: 94169bff84930567342b5a76e04d367236dafc60b40c5afb3307ea241b4615a0
font_01_sfnt_off0000dba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA4 10104 bytes
SHA-256: 91258a58f65d62043af0b2b798415dcf49a83fabeac85e7c8959bd8e682efc4b

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