Malicious PDF — malware analysis report

Static analysis result for SHA-256 d20ac209b8c4207c…

MALICIOUS

PDF

151.3 KB Created: 2021-03-24 03:44:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 460b51d66c6d53b8c6df2f996bf9b494 SHA-1: c893e9be849a0fcedfce3340b2c09086cc88f570 SHA-256: d20ac209b8c4207ca3ed4c9c75d4405af35d29b1b0caa00166925b8e79df7402
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to disposable hosting and link farms, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to be a lure related to search terms, aiming to trick users into clicking these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 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=ottoman+empire+history+in+urdu+pdf PDF link annotation
    • https://tasukivokojut.weebly.com/uploads/1/3/4/5/134592673/308321.pdfIn PDF document text
    • https://rusipowesurajuk.weebly.com/uploads/1/3/4/5/134520473/fowapuwoludagemoza.pdfIn PDF document text
    • https://kewenarizifosiz.weebly.com/uploads/1/3/6/0/136092989/574bbd265b3.pdfIn PDF document text
    • http://bexixibeguben.sportsontheweb.net/46956818675.pdfIn PDF document text
    • http://witomemu.scienceontheweb.net/negiwe.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/YKQgfji/30216569989.pdfIn PDF document text
    • https://cdn.sqhk.co/fipimomozuk/jipUz93/55039238544.pdfIn PDF document text
    • http://lobafor.mypressonline.com/kodagazibe.pdfIn PDF document text
    • http://kalulib.iblogger.org/ecers_3_cheat_sheet.pdfIn PDF document text
    • https://mumovukejepi.weebly.com/uploads/1/3/1/4/131483147/09e21d9ee91a.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxowowi/ehf1mcT/king_empire_665_alto_saxophone_reviews.pdfIn PDF document text
    • http://labiosdewonda.com/childrens_illustrated_dictionary7bqmc.pdfIn PDF document text
    • http://gevotumawifal.22web.org/paxudimitiwaseki.pdfIn PDF document text
    • https://cdn.sqhk.co/namaboniki/jhhV1ge/best_frosting_recipe_for_chocolate_cake.pdfIn PDF document text
    • https://cdn.sqhk.co/puwukuwos/Sfib4ha/koturexuledev.pdfIn PDF document text
    • http://nadixonoju.iblogger.org/wulegidifisiwezonefigi.pdfIn PDF document text
    • http://bonifacy.site/tamopanuwelpdu7o.pdfIn PDF document text
    • http://vogudikomi.getenjoyment.net/lorubaxifubev.pdfIn PDF document text
    • https://cdn.sqhk.co/guranotup/yjchbih/kewogepibofirobonolenaguf.pdfIn PDF document text
    • http://bristol-yalta.run/73934638134l0bt0.pdfIn PDF document text
    • https://cdn.sqhk.co/xonipavu/hjuBgjc/tiloxuli.pdfIn PDF document text
    • https://cdn.sqhk.co/jixuvepabu/8hiifii/juluvewidesoxafofabona.pdfIn PDF document text
    • http://instapriz.website/shri_ganesh_ji_ki_aarti_song4did4.pdfIn PDF document text
    • https://pizijejubuga.weebly.com/uploads/1/3/4/8/134883891/tifamugarop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vozajaw.rf.gd/58787671886.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001f933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F933 5376 bytes
SHA-256: 16ce93a0bde3e0fcdb61ffcad7e96e659ba047ad944551eae6e229f1bb54367a
font_01_sfnt_off00020b53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20B53 15644 bytes
SHA-256: 10923f3d73e424795427872994a1a3595f2a76aaab5cf4bec8191507def45361
font_02_sfnt_off00023800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23800 16604 bytes
SHA-256: f33bee6121e0ac300659a3f7382d8ba1dd901dfef6dfc5e9231fcc3d2f984782