Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff1b894735478333…

MALICIOUS

PDF

69.0 KB Created: 2021-03-16 22:17:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: e6368de52c870c45b21e860474d711e0 SHA-1: 89445ee7890e519f09d6eab6726892aa6de2ca40 SHA-256: ff1b894735478333eee8f4c6283af7348a20491ec127cd98621d310614f07981
186 Risk Score

Malware Insights

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

This PDF file contains numerous external links, forming a link farm, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, contains references to 'Drastic ds emulator 2.2.1.2a apk cracked', suggesting a lure to a potentially malicious website. The presence of many external links indicates an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://resalured.ru/wix?keyword=drastic+ds+emulator+2.2.1.2a+apk+cracked PDF link annotation
    • https://kazenatujexisof.weebly.com/uploads/1/3/1/6/131637291/1c511cf.pdfIn PDF document text
    • https://fekifefexil.weebly.com/uploads/1/3/0/8/130815726/bizasubax.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424341/normal_5ff77b11cbf08.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371004/normal_5fef9899dff6a.pdfIn PDF document text
    • https://cdn.sqhk.co/woxipepevati/ji4gfgh/genoxajalevozewu.pdfIn PDF document text
    • https://rakatifuz.weebly.com/uploads/1/3/5/9/135964199/duvulowixope_galunidesaroz_visenedabib.pdfIn PDF document text
    • https://fubexomufepa.weebly.com/uploads/1/3/4/8/134850999/geroxitu.pdfIn PDF document text
    • https://gupapuna.weebly.com/uploads/1/3/4/7/134726568/8dfed1be.pdfIn PDF document text
    • https://direnebem.weebly.com/uploads/1/3/4/6/134641367/sefelob.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498345/normal_6005ac84bab3f.pdfIn PDF document text
    • https://cdn.sqhk.co/kapokosop/i97qSBz/hexion_chemicals_stock.pdfIn PDF document text
    • https://cdn.sqhk.co/ranetixeba/cD2LhfN/atmosphere_lullaby_music_for_babies_8_hours.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366401/normal_6048575c604ec.pdfIn PDF document text
    • https://cdn.sqhk.co/bikuwizatag/giaigjb/dirukuvumejopipuwatupupuz.pdfIn PDF document text
    • http://zitirisiz.mywebcommunity.org/historical_criticism_in_literature.pdfIn PDF document text
    • https://wufanamokedig.weebly.com/uploads/1/3/5/3/135326106/b95ca209482b.pdfIn PDF document text
    • https://xuwuperozaposa.weebly.com/uploads/1/3/2/3/132303395/149515.pdfIn PDF document text
    • http://suzamajotibe.mywebcommunity.org/27022918801.pdfIn PDF document text
    • https://cdn.sqhk.co/kerametunal/hejfXjc/bitojozalupebifuvidufireg.pdfIn PDF document text
    • https://kazigujexumakul.weebly.com/uploads/1/3/4/3/134320364/6056093.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ledaruwevegoxu.onlinewebshop.net/39443709062.pdfIn PDF document text
    • https://d5fb4b5d-766d-4e54-ab1c-ecc61d2b7d82.filesusr.com/ugd/b0c8dc_a44944d710854fa89f9936e18a6407f9.pdf?index=trueIn PDF document text
    • https://601bead5-a720-4f65-98db-62fe2a42cb91.filesusr.com/ugd/0e52b4_9ac2d931cb3047dc99c407aaa993a3b0.pdf?index=trueIn PDF document text
    • https://160e4e15-e27a-4ef2-9b26-f67fc0969a86.filesusr.com/ugd/cbdbb6_5acf3a73ffe94c46b3c359373d457292.pdf?index=trueIn PDF document text
    • https://ab25a8b3-4d80-4d4b-93a1-c1347014fa7c.filesusr.com/ugd/8d0191_5dbd6ab169a44d41ac9c10dcd55b3e74.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_off0000cef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF6 5500 bytes
SHA-256: 756eec14b9453502d1cc4b1ea4d6982435941621f3c44b14ba6e451d753f598a
font_01_sfnt_off0000e1a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A0 10152 bytes
SHA-256: a1204635050721556257fcec3c9399e8bf3fd778f0082fccc068c064c329cbf5