Malicious PDF — malware analysis report

Static analysis result for SHA-256 97a94702649298f2…

MALICIOUS

PDF

85.4 KB Created: 2021-03-05 11:00:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e54a59e7cf5460ef13c758e98ef41f7e SHA-1: b65dd6ae7d16548555112e91d0f6fe8a562210ef SHA-256: 97a94702649298f2a8068abcf366d7e2d87273b1e8638a9654b73c76f9d16f36
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 pointing to disposable hosting, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted, but the PDF structure itself is indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://jacksth.ru/123?utm_term=what+are+the+3+levels+of+quality PDF link annotation
    • https://lujukote.weebly.com/uploads/1/3/2/7/132712447/gawubutaziri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466376/normal_601e8372cdf11.pdfIn PDF document text
    • https://bosazafaxaku.weebly.com/uploads/1/3/1/3/131383721/bazozadani-kolasore-dirageviri.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425501/normal_5fe20f33bcaf6.pdfIn PDF document text
    • https://mopopapepiror.weebly.com/uploads/1/3/2/7/132741339/92e786686dfb6.pdfIn PDF document text
    • https://rusizatigaj.weebly.com/uploads/1/3/4/0/134041601/3850545.pdfIn PDF document text
    • https://bolukuja.weebly.com/uploads/1/3/0/7/130739437/xukuwuxate.pdfIn PDF document text
    • https://zunemugegixado.weebly.com/uploads/1/3/4/6/134698728/sufovorirabem.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371248/normal_5ffada82a9f93.pdfIn PDF document text
    • https://werevofapopaja.weebly.com/uploads/1/3/4/4/134492388/832bfe8e5b17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490523/normal_602cee3ebe434.pdfIn PDF document text
    • https://mijezuri.weebly.com/uploads/1/3/0/9/130969422/3594175.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393635/normal_5fef01bebc47f.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/d4c44a7f-0c22-43f0-b0b8-f89df5b6f61b/minn_kota_riptide_112_87.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63e4dac6-e48e-4606-abb5-a42bcd3d8c54/how_to_adjust_color_on_hitachi_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd3dd4a1-dc51-4e43-b685-e64e6394bd22/duruberuwemabajuxorazofol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b24bd57-2460-4b68-81ae-f288e6dbabe6/eating_for_life_meal_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d09379fb-4450-4520-9916-2b7a799e776c/influence_the_psychology_of_persuasion_by_robert_cialdini_2014.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e123f02-5abb-426b-9370-08c99b0d31d2/wafojimitepamera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42dfbad0-ccd9-4171-8719-80c5e943742f/the_darkest_minds_book_3_common_sense_media.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c82ae952-1dd8-46cb-8bb6-326ea1c03faa/black_and_decker_electromate_400_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21c5a89a-96e5-4946-a602-34ed4564dd41/how_much_does_it_cost_to_build_a_mile_of_road.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d68728ea-9e9c-41f6-bcb1-35fd460b1717/best_warhammer_40k_books_to_start_with.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_off00010fe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE9 5320 bytes
SHA-256: 41022241e969608e7a1bf83ef3471c76e9dddd5c87e9fa98fff7fca95b654f4f
font_01_sfnt_off00012218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12218 11316 bytes
SHA-256: 3c8eb9ae3a3dd52864a33370eba5d3b58ee7d9e45fe89e51014d242affec1c37