Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d6afb9650f0d5dc…

MALICIOUS

PDF

78.7 KB Created: 2021-03-10 16:23:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 02c5ddacdeeed93e6d90dff636279517 SHA-1: 21047a2d2ea43cb22473369e3f22aa39a2377847 SHA-256: 6d6afb9650f0d5dcffc44fefedccd031ad53c659363a2aaccb82864822419336
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content or for SEO manipulation. The presence of a URL with a 'keyword' parameter further supports the lure-based nature of the document.

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://jumiwimov.ru/wb?keyword=minn%20kota%20ultrex%2080%2052%20for%20sale PDF link annotation
    • https://sukaxivex.weebly.com/uploads/1/3/4/8/134895869/jemebogewomoju_getodokukus_ruxefugavodij.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/2036056.pdfIn PDF document text
    • https://tokinuxo.weebly.com/uploads/1/3/4/8/134848772/xevarobikaj.pdfIn PDF document text
    • https://levukuwaxumofet.weebly.com/uploads/1/3/1/3/131383949/68c5051db1ed4ec.pdfIn PDF document text
    • https://zosifoke.weebly.com/uploads/1/3/0/8/130813504/d9abaf36ca6b.pdfIn PDF document text
    • https://vaxetilunakado.weebly.com/uploads/1/3/4/0/134012354/kajumojedi.pdfIn PDF document text
    • http://xijulefabogi.getenjoyment.net/pavefivaruwifutivimak.pdfIn PDF document text
    • https://poperetaro.weebly.com/uploads/1/3/4/8/134893078/fasutar.pdfIn PDF document text
    • https://lepopitiw.weebly.com/uploads/1/3/4/7/134762721/xebojojorelunideziz.pdfIn PDF document text
    • https://pukogapuwobar.weebly.com/uploads/1/3/4/3/134307851/ripepofanewiluf.pdfIn PDF document text
    • https://mejodedasebedo.weebly.com/uploads/1/3/4/7/134725949/matixim.pdfIn PDF document text
    • https://riguniliwegab.weebly.com/uploads/1/3/5/3/135342973/4302081.pdfIn PDF document text
    • https://furimulu.weebly.com/uploads/1/3/1/4/131411024/4530613.pdfIn PDF document text
    • https://xutekesavugev.weebly.com/uploads/1/3/5/3/135316407/zizazamilafeze-ketirevewewava.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lokokojorivumi.rf.gd/39191460726.pdfIn PDF document text
    • https://6fd4412c-3e6e-4f21-a9af-8137ffc6c0d9.filesusr.com/ugd/03469c_912d63e175224f3a9388b831e79de55f.pdf?index=trueIn PDF document text
    • https://329f26c8-0235-4118-8622-173d264d9cf1.filesusr.com/ugd/221f3a_6383429069914c3bb1397cd9331655b0.pdf?index=trueIn PDF document text
    • http://nudenagazosizav.epizy.com/viva_video_maker_uptodown.pdfIn PDF document text
    • http://tokozod.myartsonline.com/how_to_renew_reduced_fare_metrocard.pdfIn PDF document text
    • http://gizenelik.rf.gd/abc_radio_774_program_guide.pdfIn PDF document text
    • https://c546c886-5aa5-41cc-813f-4ed3e146772c.filesusr.com/ugd/b3e52d_e794c276ea27415999ae717fd735d709.pdf?index=trueIn PDF document text
    • http://makakanow.onlinewebshop.net/mosejibeniwibadapu.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_off0000f3f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F4 5488 bytes
SHA-256: 017e17d7b6f8958514979f9ad76f12f18c0bd64349c3ca8945dcc1899760b89f
font_01_sfnt_off000106c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C4 10872 bytes
SHA-256: 3a9b5083fbe97515236bda663c3975dd64add25dcf6f9483dfd8a87c7441f709

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