Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ab79f9f57513b83…

MALICIOUS

PDF

77.5 KB Created: 2021-03-18 09:32:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 18d782a30fb131f9c5964235a5b5334a SHA-1: 8b087857898789c5c380d006a1dc76658bf1a257 SHA-256: 6ab79f9f57513b8363e7b3b4b8a8e7a82acf550a6e41c597797780000732cef0
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to direct users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a tactic of luring users to download software or visit malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/wix?keyword=download+first+touch+soccer+2015+mod+apk+revdl PDF link annotation
    • http://kevakigev.medianewsonline.com/adjective_worksheets_with_answer_key.pdfIn PDF document text
    • http://miwewumexurigan.sportsontheweb.net/ranger_boat_dealer_carlos_mn.pdfIn PDF document text
    • https://cdn.sqhk.co/doxelatofon/ibx0wgf/clue_hunter_gloves.pdfIn PDF document text
    • http://dukepiweg.iblogger.org/mamubosimedabugufu.pdfIn PDF document text
    • http://topafigo.mypressonline.com/89394071298.pdfIn PDF document text
    • https://cdn.sqhk.co/fakomuse/b87gg3T/call_of_duty_ww2_for_xbox_360.pdfIn PDF document text
    • http://zuzorovix.scienceontheweb.net/53244967857.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://e5baaea7-7007-41de-9367-4ebf3ed55875.filesusr.com/ugd/8e1900_4b11804ae6384762bfdbe98094763161.pdf?index=trueIn PDF document text
    • http://zefabufuz.epizy.com/what_was_the_importance_of_the_agricultural_revolution.pdfIn PDF document text
    • http://gikifipililiza.epizy.com/wufarudadalazisewefunema.pdfIn PDF document text
    • https://d7179dab-c972-4501-9f4a-16044ca71e84.filesusr.com/ugd/434f74_7097130ecf3b44d5a7faa8b4a849cb4e.pdf?index=trueIn PDF document text
    • https://afa032df-bfad-47da-a9c8-c79260182993.filesusr.com/ugd/6f9b04_76f9be236c8a4803a8128395d5279b7c.pdf?index=trueIn PDF document text
    • https://436240a4-ef10-404e-ad90-c5cab949c7af.filesusr.com/ugd/3fb742_1a62eb034b354ed6a7b1f43f5d5f75cc.pdf?index=trueIn PDF document text
    • http://ruruwuvatokatal.onlinewebshop.net/mowolokekizopabilul.pdfIn PDF document text
    • http://rupeguv.epizy.com/tanigimas.pdfIn PDF document text
    • https://69868269-04aa-4a0d-8379-1371762fd556.filesusr.com/ugd/d8beff_86b0ff1918a746338944305ba83f582c.pdf?index=trueIn PDF document text
    • https://f0f855fd-29d2-4bf6-9fdd-af1de8d1f91d.filesusr.com/ugd/184831_af680c65a91a4d99a7af0f4ce20d13c4.pdf?index=trueIn PDF document text
    • https://26f2e344-8444-46ea-90c9-5a893bcc2fb3.filesusr.com/ugd/b8c837_dd16759c437b40ebac2cb3593c4b3264.pdf?index=trueIn PDF document text
    • https://c11ab09e-384c-4904-8c79-5ef6f38008df.filesusr.com/ugd/7131a6_31e07c5e776d4103b03ca7c7bbf3cf87.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C4 5944 bytes
SHA-256: f18a318c4ba232a4a29d136492a5a4c42403689c58d227bad9de29697c386a2c
font_01_sfnt_off0000f4f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F5 10984 bytes
SHA-256: 16e7308facb0d05a9d0fd435fb5834ad26cd24c5d26ac4c0a4db9c0b80731dd0
font_02_sfnt_off00011a7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A7B 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f