Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f31fef6a07d4a8d…

MALICIOUS

PDF

84.0 KB Created: 2021-03-31 01:00:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 4368cf6d93572fdda9da16bf4da1420b SHA-1: cb039ad01d3438049dde07ed8259f92b631a242c SHA-256: 7f31fef6a07d4a8d1dc91d893aadedba1c4498236ea42c58670f70746545d214
186 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of a link farm. It contains numerous external links, including one to 'fokemale.ru', suggesting an attempt to redirect users to potentially malicious or spam content. The document's content, though heavily obfuscated, appears to be a lure related to Feng Shui, likely to improve search engine ranking or trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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://fokemale.ru/strik?utm_term=feng+shui+curtain+color+for+living+room+2020 PDF link annotation
    • https://gopaposoxawa.weebly.com/uploads/1/3/0/7/130740193/wagaro.pdfIn PDF document text
    • https://cdn.sqhk.co/zefinotobi/Vlii2Gl/67913356496.pdfIn PDF document text
    • https://cdn.sqhk.co/zisazege/gizjgic/65851894239.pdfIn PDF document text
    • https://cdn.sqhk.co/gumakulex/luhji5j/haunted_grandpa_house_horror_survival_escape_games.pdfIn PDF document text
    • https://cdn.sqhk.co/dofofigeniso/ggeHict/68051144735.pdfIn PDF document text
    • https://cdn.sqhk.co/legusovej/hh9ZC6o/jetpack_joyride_mod_apk_download_latest_version.pdfIn PDF document text
    • http://begetus11ppz.xyz/zarosironisanozidali6b3.pdfIn PDF document text
    • https://xigeworimejol.weebly.com/uploads/1/3/1/4/131483719/xewog_xuwovisosasukir.pdfIn PDF document text
    • https://cdn.sqhk.co/jukowejazus/gioidrP/rulorugulagelute.pdfIn PDF document text
    • http://reassurez-moi-fr.info/kiwekanegomccb1.pdfIn PDF document text
    • http://gsmall.space/72981254601z1p5l.pdfIn PDF document text
    • http://shopsmmv.site/native_instruments_traktor_kontrol_s4_mk3_review4ymw6.pdfIn PDF document text
    • https://cdn.sqhk.co/vavefamixivi/2jhijIt/1027712910.pdfIn PDF document text
    • http://mrshadow.net/7337504228xdz90.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbe33b54-1757-4836-9a99-e3a7b568f178/pufakagigigujuwexowinefo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74f2a306-43ae-42e3-8ef5-1ef76e8d01a8/focusrite_scarlett_2i2_1st_gen_price_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c3e7b6e-5086-4f69-a2d4-95c73b262e31/rutgers_information_technology_major_requirements.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce9cf2df-cdd3-42ea-80df-2b29d2e00df1/how_to_do_npv_formula_in_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d013035e-5050-46e9-9028-cad557005789/coleman_electric_furnace_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b67072b-5d27-4914-8e5c-0575db2ad27f/the_game_plan_peyton_gets_sick.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_off00010a6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A6D 5584 bytes
SHA-256: 6450022ce3cbe4ad1ac603a60446f1c4035cfb9a9380ddb0f15fc6d450992f67
font_01_sfnt_off00011d55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D55 10880 bytes
SHA-256: b85b033563466a53c9f9e6985b9e8fd753b7938c87c5b15d894457a401922ad7