Malicious PDF — malware analysis report

Static analysis result for SHA-256 c19a74571279ae45…

MALICIOUS

PDF

69.7 KB Created: 2021-03-28 19:06:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: b97208b2f00202c492a2aef29d6a6ef3 SHA-1: 0f56cdac615ac8c6dc25bd8f9132033bcbbec661 SHA-256: c19a74571279ae45e40f17af643def435c3d80267810d5b6e26248b28a9bdec3
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs pointing to disposable domains and link farms, suggesting an attempt to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to study guide answers, aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/wix?keyword=american+pageant+13th+edition+study+guidebook+answers PDF link annotation
    • http://sokobumoxagug.scienceontheweb.net/38086162752.pdfIn PDF document text
    • https://jagusidenoz.weebly.com/uploads/1/3/4/9/134902343/2029461.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421056/normal_6002735b0f7b4.pdfIn PDF document text
    • http://pro-konditer.com/nozelomolg7va6.pdfIn PDF document text
    • https://bepefuligifeval.weebly.com/uploads/1/3/5/9/135981888/3346666.pdfIn PDF document text
    • http://zoosalon.org/monster_vision_toy_reviewi1xmz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496151/normal_5fc690a790468.pdfIn PDF document text
    • http://xatovapotogu.mywebcommunity.org/cuales_son_los_sintomas_cuando_se_le_baja_el_azucar.pdfIn PDF document text
    • https://nituxokijawagez.weebly.com/uploads/1/3/0/9/130969825/girobine.pdfIn PDF document text
    • https://kibasixeb.weebly.com/uploads/1/3/1/4/131438563/4636503.pdfIn PDF document text
    • https://togoxijagujeg.weebly.com/uploads/1/3/0/7/130775712/8007025.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389794/normal_6032bfdc7bd97.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418566/normal_5fc71e8d4208c.pdfIn PDF document text
    • https://cdn.sqhk.co/keridola/5shHhbx/my_pillow_topper.pdfIn PDF document text
    • http://olivamebel.com/free_bargello_quilt_patterns_to_downloadlh73j.pdfIn PDF document text
    • https://cdn.sqhk.co/xalibolopov/dH0gdlR/febepawe.pdfIn PDF document text
    • https://cdn.sqhk.co/xotosobupis/1VPghj6/disneyland_droid_depot_options.pdfIn PDF document text
    • https://wizisenax.weebly.com/uploads/1/3/4/3/134320615/b03e91c4344956.pdfIn PDF document text
    • https://cdn.sqhk.co/jotepomi/EidhgQA/real_car_simulator_game_for_android.pdfIn PDF document text
    • http://kefets.xyz/how_to_describe_full_time_employee4v5fv.pdfIn PDF document text
    • http://instapriz365.online/zulojeginiwurijuepj0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d24d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD24D 6056 bytes
SHA-256: 26b12a70d4ae6c4a13520d496e6f836b3eed32be2276593f4d7891700d6684f4
font_01_sfnt_off0000e6d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D5 10340 bytes
SHA-256: 2790321d20df072f8884039c2f936274da7014cb10985d373701b93d0b682c1d

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