Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f0d024d7970cd3d…

MALICIOUS

PDF

86.4 KB Created: 2021-05-29 16:34:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 21cb08d473390ed327608f7d54dbfb96 SHA-1: 237e9d45e25e75ec2fc1eed17a05e4380240e42f SHA-256: 7f0d024d7970cd3d7b91157461620a8057b64f9af192ccd21c5958b4d75429cb
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were directly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://xajibur.ru/strik?utm_term=elodie+yung+age PDF link annotation
    • https://mozapimijovami.weebly.com/uploads/1/3/4/6/134661863/a1378a599f1194.pdfIn PDF document text
    • https://vazanekufom.weebly.com/uploads/1/3/5/3/135322674/mimisufog_sogozotufa_xojumugagow.pdfIn PDF document text
    • https://nafesidupige.weebly.com/uploads/1/3/2/6/132680955/0dc3d7ee6.pdfIn PDF document text
    • https://vujoxakot.weebly.com/uploads/1/3/4/3/134318531/e236993959ebedd.pdfIn PDF document text
    • https://xasirazabad.weebly.com/uploads/1/3/4/6/134699738/misivufatogum.pdfIn PDF document text
    • https://kamenibez.weebly.com/uploads/1/3/4/7/134727972/2305144.pdfIn PDF document text
    • https://gixajukixopa.weebly.com/uploads/1/3/4/8/134877082/puwopujasugeluk-puzejuwabiwewa.pdfIn PDF document text
    • https://momugidofene.weebly.com/uploads/1/3/4/2/134235368/56757.pdfIn PDF document text
    • https://wivusogonelom.weebly.com/uploads/1/3/5/3/135310870/9086410.pdfIn PDF document text
    • https://kimidagox.weebly.com/uploads/1/3/4/4/134470984/tefolubo_nupikuv_bipav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/02d9dbe1-0177-4207-be9b-d8ed82c60706/the_5_dysfunctions_of_a_team_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/597dfdac-616c-4e07-a6df-33da426e2bb5/332391264.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83d411eb-0480-40f8-afdb-3631307d8f5d/can_you_put_a_box_spring_on_ikea_slats.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f76527b-b4e7-461c-9f60-e2ea8f0c0eaf/dusuzijatuwamaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3d7b755-bb0d-4040-80f1-6c2b089a9c5a/vepubabaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7c3241d-1062-45c1-8a07-dd964d211395/lash_extensions_near_me_mobile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da18dec7-5ce6-4c45-907c-79638c78f835/83548555767.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3155db46-c933-4cde-b224-a844a62aa791/60562953527.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4331582c-1b97-4511-abec-64651e6be7a5/39174221918.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f0f89ec-07fb-4c12-bd6b-dc67d42f46c6/18884160459.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d587d94-3688-4ac8-b8b1-e5d1d9f492cd/what_is_the_best_light_therapy_for_rosacea.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14b1e208-e517-4ccd-820b-8e843d2997ba/why_is_my_fire_alarm_beeping_once_every_minute.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbab91b1-9fa7-414e-af45-a7607c7a7f41/kung_fu_panda_3_life_lessons.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4034c2b9-700e-41c0-94af-689b49e1bf54/67809046552.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fe86fa5-3265-4c0c-8f42-3489276569a7/sojij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f5ba593-d27e-4f58-9ae0-7aa44b990b8c/xukanawutunoge.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001079a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1079A 4776 bytes
SHA-256: 2b0c260db884cccd2b6ddf67108a95cca237dcc9b1299da2753df5c7f1b957a4
font_01_sfnt_off000117f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117F2 3732 bytes
SHA-256: 03cd7b41ad0a040b6891231e8d40cdabcc0a4548ed96b03313766484b4926597
font_02_sfnt_off00012657.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12657 11064 bytes
SHA-256: 98bab2956d998160d204afb7d1f97ce51c26d253a4fd3f80a435501d4c475891

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