Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c2e84e200479f32…

MALICIOUS

PDF

78.4 KB Created: 2021-04-25 18:36:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 526b7d64a5b0a89e3470ca9b5bb46b87 SHA-1: b71dc7bfcf8054af59238fee659702b2671daaa1 SHA-256: 6c2e84e200479f32711966b745a6ef8c765e2131affe0840d26293202a7781a2
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and external links are indicative of techniques used to distribute malware or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/strik?utm_term=how+to+make+a+paraffin+heater PDF link annotation
    • https://paxavolufogese.weebly.com/uploads/1/3/4/6/134600391/bd40ee7519.pdfIn PDF document text
    • https://fanevatonalusi.weebly.com/uploads/1/3/1/6/131637928/44eb8.pdfIn PDF document text
    • http://jekeluxuto.mywebcommunity.org/tumufuveweboginikot.pdfIn PDF document text
    • https://cdn.sqhk.co/rasepotobami/IZygjgh/69919507575.pdfIn PDF document text
    • http://nuwevabufa.mypressonline.com/gomuwip.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/ZhjoTn5/chicken_sounds_like_she_s_sneezing.pdfIn PDF document text
    • https://cdn.sqhk.co/gatavikap/icejbjh/diy_halloween_party_ideas_for_adults.pdfIn PDF document text
    • https://kodidorimo.weebly.com/uploads/1/3/1/3/131380292/namikinogefo.pdfIn PDF document text
    • http://topafigo.mypressonline.com/79016437220.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://486a928f-df87-4682-b39c-9199637d78f9.filesusr.com/ugd/982a49_eb55f60ad86f431188fa33810a95ceea.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/45ef18a3-980e-4336-8169-9041e23c543f/9595378203.pdfIn PDF document text
    • https://5e9c932d-19a8-4d5a-a970-d4bc0bcb832b.filesusr.com/ugd/bae0a0_6fa344d1401a4550afc066d961ea787c.pdf?index=trueIn PDF document text
    • http://kuxubakelixuzot.atwebpages.com/degree_of_freedom_mechanics_examples.pdfIn PDF document text
    • http://roporuti.onlinewebshop.net/makalah_ruang_lingkup_akuntansi_manajemen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ad632f1-9444-4be4-89c1-679bfddbe8ce/will_there_be_another_hunger_games_book_5.pdfIn PDF document text
    • https://f0ddeb88-3549-4a27-8821-6e3dd713f165.filesusr.com/ugd/2b74da_806973613f4e4d11ba110d528d7e2aac.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/459e0b43-6842-4660-a5bf-62191b557a8f/keto_bread_bakers_cookbook.pdfIn PDF document text
    • https://8533cbf3-c0d6-400c-bdf8-8ca38cf0242b.filesusr.com/ugd/135178_035110f6d6d147e1865b510a75868f6b.pdf?index=trueIn PDF document text
    • https://305aa2e3-e1d2-413d-aa2e-f1bb83d03ded.filesusr.com/ugd/92ee2b_df0c20abc2f64de4969d86c1530dd23f.pdf?index=trueIn PDF document text
    • https://8be317c1-93d6-4444-9a1c-030c84ae583f.filesusr.com/ugd/709942_5469f6f935ad4d3183a6b432ffa06ab1.pdf?index=trueIn PDF document text
    • https://144ece88-722e-4d59-a9d1-ae16887514c2.filesusr.com/ugd/48b17f_20fa82508cfb4e91892993367319328e.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_off0000f32c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF32C 5048 bytes
SHA-256: 557a5e2d129a322cd03e3eab778f6caedd2bb79eeea730e3695ffddfc1423ff9
font_01_sfnt_off0001043d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1043D 11932 bytes
SHA-256: 44d0975cc7423ac3fff0841f65acddabc607c1bf8607c2271f9561c7c5bb8b68