Malicious PDF — malware analysis report

Static analysis result for SHA-256 380047deb3668fae…

MALICIOUS

PDF

81.3 KB Created: 2021-04-05 08:13:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: d035eeb21da397e8a0ef4ca95ca9ff02 SHA-1: 25d8cd10418da1b8bc31e3ffb39ba18f5c2cdba8 SHA-256: 380047deb3668fae05636f1837b018bfe4686b6d74644f288682081dd76a645c
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are hosted on disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • 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 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.
  • 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://baarspo.ru/aws?utm_term=what+are+the+physical+requirements+for+indian+navy PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4495399/normal_60676c3343922.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465688/normal_5fc9a5574c6fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375203/normal_5fdc8a61578bd.pdfIn PDF document text
    • http://fofumumitem.medianewsonline.com/fidunigajat.pdfIn PDF document text
    • http://pipavinekiga.mywebcommunity.org/ropimoru.pdfIn PDF document text
    • http://zolomakowifop.iblogger.org/52747190419.pdfIn PDF document text
    • http://wisatemubudu.medianewsonline.com/stack_on_10_gun_safe_key_lock.pdfIn PDF document text
    • http://zanovekolasin.mywebcommunity.org/buzadizo.pdfIn PDF document text
    • http://xebupalifu.22web.org/15003604654.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9c43cb74-45e3-47de-9527-fda2e8336169.filesusr.com/ugd/af0aa9_ad44103c546040d792a1669559ddc131.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/22ab27a8-3bc6-4376-8d75-ae261612b6fa/78690907553.pdfIn PDF document text
    • http://rupesujutiwu.myartsonline.com/15726962319.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20a2a937-6869-497f-8247-6862df154597/61488994581.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2c3c503-2280-47b2-8ad4-d8a1a80c94e9/clark_c500_ys80_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45e6a093-4e0b-4ded-825e-b18e194bce59/12149728431.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b0b5865-88fe-46f1-8c30-7f5acd699ff7/pos_pax_s80_manuale_in_italiano.pdfIn PDF document text
    • https://f904ef53-caa1-4f0f-8a97-c50675c03ece.filesusr.com/ugd/2f8cea_d1556631ba034a878da10721857eb4bc.pdf?index=trueIn PDF document text
    • http://dusilasazeli.rf.gd/amygdalite_aigue.pdfIn PDF document text
    • http://povapetaranawo.rf.gd/patapukoxizijujuwunu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5af2829c-3bc7-4abe-9a25-51935c98214d/accu_chek_performa_e9_message.pdfIn PDF document text
    • http://xizefuta.rf.gd/biology_practice_test_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73bad64e-5441-4e10-bcfb-0d51c30d0592/chess_tactics_pro_app.pdfIn PDF document text
    • https://b01cffea-7a05-49e8-9781-04202a21c04b.filesusr.com/ugd/d5d855_d410a8ea8d4a4eda9fea1c187f620c6f.pdf?index=trueIn PDF document text
    • https://1160a196-6e18-49bd-931c-438029629b47.filesusr.com/ugd/40338c_91960310626741b9a4fa3b4792ad2fa7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/937dfb99-a08c-49c8-94b0-f21f776cce17/15811867007.pdfIn PDF document text
    • https://7fca5364-97a1-4441-b76e-d2c429a59218.filesusr.com/ugd/735424_cb23defdc8da4a9cacb2d1f314543ef5.pdf?index=trueIn 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_off0000fd9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9B 5696 bytes
SHA-256: f67e3d40b1debe1e7bc348e0d66fe893fbf9c55a3febb122b99a365287b12d12
font_01_sfnt_off000110e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E6 11160 bytes
SHA-256: 85c833df9cb76d88408d8bad61663256bcf51b3ef942507e2f5ba3c2d5cf840c