Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e46b5f8a306b12e…

MALICIOUS

PDF

75.2 KB Created: 2021-05-21 09:01:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b1dea57accb80c803f0d8f4e2e039edb SHA-1: 2f7c474a8d247c8e4582a6d59c1ee3d8cfc9868e SHA-256: 1e46b5f8a306b12e3001a316160044da7e2d89115075edc44933b98070948760
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent link disguised as a book title. This technique is commonly used in phishing campaigns to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://golowaki.ru/strik?utm_term=fundamentals+of+chemical+engineering+book PDF link annotation
    • https://wovovude.weebly.com/uploads/1/3/1/3/131397940/3159142.pdfIn PDF document text
    • https://rulorakaduf.weebly.com/uploads/1/3/4/4/134480735/4834303.pdfIn PDF document text
    • https://dibasipelop.weebly.com/uploads/1/3/0/7/130738559/ropoduvinefile.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/kewakuko/titinanixo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/297f9cbf-36a1-4bce-889d-c6792e55b751/fevazuxofem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9a77f60-4d70-4ecf-94c9-1ee361840bfb/how_to_put_something_in_slope_intercept_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/900e5a98-7d14-47c6-87d5-a9bf12aaa37f/42519422319.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/18709236608.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/tigedukakadulemelufa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d2ca285-9982-48ca-bc1e-ddb3fab90655/will_chamberlain_remote_work_with_linear.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c92cb5f-bfb3-4dae-8f7b-d84001e7086c/best_air_fryer_recipe_book_australia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95826b3b-f430-4ce3-a943-f109603c2940/how_to_fix_petsafe_collar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e40607b4-d977-4533-9775-7fab553795ed/national_highway_traffic_safety_administration_crash_statistics.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/ziwewuvuwofaxikufilup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6a11184-ee79-49a5-8e92-03bbb50f90c7/gizovesadawi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41518990-ceb2-4d59-a5cf-285ff8b39979/how_to_calculate_instantaneous_velocity_from_a_graph.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/064e9e4b-5670-4a5d-98b5-71dfde0a3889/potekodogaramavado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d61d84d9-d260-474b-80d0-f31a505a13ed/what_kind_of_government_did_greece_have.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97d98032-69c4-401a-a7b6-6c750333834e/what_is_the_meaning_of_seasonality.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fda5f6f9-73c9-4dd3-85ef-ec0b363035a7/sahih_bukhari_hadees_in_urdu_images.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/chanel_belt_size_guide.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_off0000e810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE810 5596 bytes
SHA-256: ee10486d28f6bea6a535bdf739e23f30f279fc24da0b3bfec5c0a9411bd2f55d
font_01_sfnt_off0000faef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEF 10560 bytes
SHA-256: 9a61d5612ec47b2f3cc3f37101130df5c21cdefc8a317f0cf17a559d9e9ae0e1

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