Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e02cf9b4426a986…

MALICIOUS

PDF

75.3 KB Created: 2021-04-19 08:40:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 8c5e5cc77ff6684d12957e0da57a3993 SHA-1: b6389b42ec7d70a4434e55ff960968e7c770853a SHA-256: 7e02cf9b4426a98677892b5241446ecf5c573ac83b7e8b3c0821f6b021f68337
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, appears to contain text related to watch instructions, serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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 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://botokaw.ru/strik?utm_term=how+to+set+date+casio+illuminator+watch PDF link annotation
    • http://ru-1.casa/nirozemazopiwoxadiwudotmb34d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367922/normal_5feb95bb921f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459166/normal_6052eb8c79dbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465702/normal_605b9f6aec25b.pdfIn PDF document text
    • http://unosital.space/a_summer_lifeq989v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374175/normal_60523190b83da.pdfIn PDF document text
    • http://defi-bet.world/20637007569pme2n.pdfIn PDF document text
    • http://regvoolkim.website/basara_batch_sub_indo3lxco.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401973/normal_5fecca921e1ae.pdfIn PDF document text
    • http://vigastlens.xyz/669526123417r664.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/what_is_your_sexuality_test_filter_instagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8d79ca9-8bec-4d01-a7be-858f24477cac/the_rock_climbers_training_manual_download.pdfIn PDF document text
    • https://183df7f2-4185-4ca0-bfcc-33b39bc842f1.filesusr.com/ugd/9ac34a_8ee6d53ca80e4a21b2c9f45c4b963d47.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed5ec3ab-e547-4d76-91b0-1d7009f0f48b/bexabebalanemabumu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/428733f4-8a45-4fd9-b443-bd874fb12019/socratic_questioning_activity.pdfIn PDF document text
    • https://d6a293f2-6876-493d-91b7-c13182b05023.filesusr.com/ugd/bcaa7e_b2df6336ec134d5ea6589a89fc5b7c38.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bogeguva/lawiwamuwirojebamo.pdfIn PDF document text
    • https://af30af13-e0b7-4de0-aca7-7783c01eade2.filesusr.com/ugd/9757e7_053b57c390d04d61ab9fa6f8b23861d3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/19f5aa81-886c-4ddf-bd9b-627060e62d45/50613166151.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/fimupejedizinavi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecee1682-3260-44b6-95a3-8e2572204f03/taliwigisib.pdfIn PDF document text
    • https://d7ae471b-a447-437d-81b4-4e603f8679d9.filesusr.com/ugd/0a3240_8470bd36feb24bbfbc605d2085e5b3fb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jagux/jetonulimiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20f8758b-b51a-4ae0-9685-87b3faf26763/pimidimajinu.pdfIn PDF document text
    • https://21036261-01f9-4725-a342-2b8b08d10099.filesusr.com/ugd/d0cbc4_281c83a115a846559e9350e330bd0ca8.pdf?index=trueIn 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_off0000e719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE719 5232 bytes
SHA-256: 9e5c87acc3ddfe7ec226dc84f9d5b4572c477039bfd47ff4f8210b549ed44384
font_01_sfnt_off0000f8c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C3 11388 bytes
SHA-256: bcb0c29bb84620d3778e9fc08279dd1606a4091e0f3e37f478889d388d87d4ba