Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b25c001f0a3c54b…

MALICIOUS

PDF

79.1 KB Created: 2021-06-13 01:22:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59bedb903147980cb21f551480556bc5 SHA-1: 71582fa750bda9342498190eb796ee633d006ad9 SHA-256: 6b25c001f0a3c54bd6a801f549ca4d7895dd3b308e08dd53947c075da39b5904
156 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 of which point to potentially malicious or SEO-farmed content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as 'Pdf.Phishing.Trojan'. The presence of numerous external links suggests an attempt to redirect users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pixomot.ru/pbw?utm_term=4g+signal+booster+apk
    • https://siridadujaxata.weebly.com/uploads/1/3/0/9/130969300/zogowuwavikefe.pdf
    • https://cdn-cms.f-static.net/uploads/4379614/normal_5fd31256d918b.pdf
    • https://fadafiwu.weebly.com/uploads/1/3/5/3/135302778/3865943.pdf
    • https://cdn-cms.f-static.net/uploads/4448548/normal_6023d731c24f1.pdf
    • https://zagefejov.weebly.com/uploads/1/3/2/7/132710748/6479156.pdf
    • https://cdn-cms.f-static.net/uploads/4450731/normal_60588c72504b0.pdf
    • https://static.s123-cdn-static.com/uploads/4413238/normal_5ff58074b3fd4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/84960911-6644-4bc3-9a45-e36f8e9a7574/what_is_a_stanza_in_poetry_ks2.pdf
    • http://jedilukiwo.pbworks.com/w/file/fetch/144583989/gujarati_bhajan_lyrics_in_english.pdf
    • https://uploads.strikinglycdn.com/files/fa8cec09-a80d-46b5-b2e0-5aa583ec1d7e/linux_command_line_and_shell_scripting_bible_3rd_edition_github.pdf
    • http://vaporezikumu.pbworks.com/w/file/fetch/144989565/vice_city_game_for_pc_windows_10.pdf
    • http://majemekux.pbworks.com/f/368699928.pdf
    • https://uploads.strikinglycdn.com/files/61f559c8-c34b-4a01-814e-4b58d4594034/rovaresola.pdf
    • http://fezosubi.pbworks.com/f/68038550616.pdf
    • https://uploads.strikinglycdn.com/files/ff432edf-50f5-44b6-a8d8-62d36c72ebea/87213313907.pdf
    • https://uploads.strikinglycdn.com/files/1e22cc6b-c30c-4614-be3a-146a17a77ae2/cuisinart_coffee_maker_grinder_cover.pdf
    • https://uploads.strikinglycdn.com/files/4f96d74a-ac10-4569-afab-eb8f4b26c5b5/nepoku.pdf
    • https://uploads.strikinglycdn.com/files/e719c28a-3f9e-4533-968f-d98c57bf169e/94746516842.pdf
    • https://uploads.strikinglycdn.com/files/7414367e-120f-4b42-ab15-bfb599cb4975/wenugetazima.pdf
    • http://poforezufovu.pbworks.com/w/file/fetch/144590337/dutujiburasegemovibil.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb97.bin
b5744868aed2c2498d19e8595513776a95e13f3726db625dd6989bcecbe985a1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB97 4972 bytes
font_01_sfnt_off0000fc7f.bin
d0ebc375edab9f24ded547875486934d8f8237e2449bb79a2f47017807158b09
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7F 10708 bytes
font_02_sfnt_off00012127.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x12127 4324 bytes