Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ceabd4e115daab2…

MALICIOUS

PDF

100.1 KB Created: 2021-05-28 23:03:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc0b3ec667c99387a5c635c08e4a50a3 SHA-1: 7a9a6312130afffe5693981e94a391a1d8c0f18f SHA-256: 3ceabd4e115daab226447cf4b715e6665ffc03dacd68675cedb6258c20f8743d
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to Weebly and Strikingly hosted PDFs, indicative of a link farm or redirection scheme. The primary URL, 'https://seumenha.ru/strik?utm_term=can+u+get+siriusxm+on+your+phone', suggests a phishing or scam attempt, likely to harvest user information or direct them to malicious content. The ML classifier and ClamAV detection strongly support a malicious classification.

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://seumenha.ru/strik?utm_term=can+u+get+siriusxm+on+your+phone
    • https://rowimibakerideb.weebly.com/uploads/1/3/4/4/134494798/1008312.pdf
    • https://cdn-cms.f-static.net/uploads/4414696/normal_60599701929f6.pdf
    • https://wimugedi.weebly.com/uploads/1/3/4/7/134725841/8228572.pdf
    • https://favasebuwakule.weebly.com/uploads/1/3/4/3/134328846/1153136.pdf
    • https://cdn-cms.f-static.net/uploads/4383156/normal_6015ea18556cc.pdf
    • https://cdn-cms.f-static.net/uploads/4489977/normal_5fd28f97385c2.pdf
    • https://rudadikisoma.weebly.com/uploads/1/3/1/6/131606677/voxikedo_pavuzovoxigalek_zonenotumixo.pdf
    • https://deximuxinudob.weebly.com/uploads/1/3/0/7/130739142/sejijedaxenomepisov.pdf
    • https://static.s123-cdn-static.com/uploads/4408324/normal_5ffdf9702984a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/601141d2-cd7d-4513-8e38-9b319a193572/19874414967.pdf
    • https://uploads.strikinglycdn.com/files/8e5671cb-0963-4963-aa59-557a3ec54708/67408585484.pdf
    • https://uploads.strikinglycdn.com/files/d2c976f7-c517-4d1b-b73e-0e37873f85bb/does_loose_green_tea_go_bad.pdf
    • https://uploads.strikinglycdn.com/files/6ed414b9-e6fe-4355-99e5-d9b96c63837c/download_bts_bon_voyage_season_4_episode_2_sub_indo.pdf
    • https://uploads.strikinglycdn.com/files/054241b3-ff61-4a1a-8d62-bc03b1eac2da/date_of_first_delinquency_credit_report.pdf
    • https://uploads.strikinglycdn.com/files/0b059290-300d-4ec0-84bb-f5e3397fabdd/what_type_of_yarn_is_red_heart_super_saver.pdf
    • https://uploads.strikinglycdn.com/files/93aedf5a-ecbb-4dff-9e22-b0256d2474a4/wunaserosaxuwumanizefonew.pdf
    • https://uploads.strikinglycdn.com/files/5a6d1a6c-666f-44db-8145-e59f78304920/birufu.pdf
    • https://uploads.strikinglycdn.com/files/f11fd3b9-6b97-4b35-abea-8a275a344a2c/the_orchard_practice_52_station_road.pdf
    • https://uploads.strikinglycdn.com/files/eb59bbdf-975d-424f-bb98-73e47061ab00/lasovixobimemaxevo.pdf
    • https://uploads.strikinglycdn.com/files/b65e58ee-ff5e-4706-9e6b-38663bd5e126/gabakikunef.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014898.bin
15e44827a8b4570ae909fba91deb636c12c7260d031048ea77874f4fd69ab5f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14898 5276 bytes
font_01_sfnt_off00015a6d.bin
4dde5d3df3f092d4b8ff7dd96a2ad51909f9a9c9fe5e24907e2d868a4b8aab26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15A6D 12020 bytes

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