Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f2ca94dc6ade493…

MALICIOUS

PDF

83.8 KB Created: 2021-01-06 06:21:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 9fd14558db10e900a281c7752b690277 SHA-1: ef0c6b970788e6015c05c0e84cb4fb5f89344d9e SHA-256: 8f2ca94dc6ade4931437f1fc7e21450bef191f5b3302e66ba5743c9900636aa9
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'mass external PDF link farm'. The presence of a 'SE_DOWNLOAD_BUTTON' heuristic and ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and link farm indicate an attempt to redirect users to malicious content, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafffe.ru/aws?utm_term=radio+script+template+word PDF link annotation
    • https://cdn.sqhk.co/nenuguvan/SKNfPic/application_letter_for_primary_school_teacher_post.pdfIn PDF document text
    • https://vanazufir.weebly.com/uploads/1/3/2/7/132740694/jigixomagaxag_bonul_larozapefa.pdfIn PDF document text
    • https://safubijob.weebly.com/uploads/1/3/2/6/132682970/9894720.pdfIn PDF document text
    • https://cdn.sqhk.co/lopumilekana/MjihMig/vh1_live_stream_123.pdfIn PDF document text
    • https://cdn.sqhk.co/pivugisaxap/VXhNUQ7/xikikavinisawoze.pdfIn PDF document text
    • https://cdn.sqhk.co/pezolaje/0AOhbgj/talking_flowers_names_and_pictures.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407070/normal_5faacf4ab4de4.pdfIn PDF document text
    • https://cdn.sqhk.co/rilabotib/jitJqjg/secret_note_16_stardew_valley_expanded.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382772/normal_5f95586fcdca9.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvojeve/iegdhfZ/7062817855.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409239/normal_5ff523fba7970.pdfIn PDF document text
    • https://cdn.sqhk.co/fusifanux/hjgihji/winking_lizard_macedonia_delivery.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fuwawibu/call_lyft_report_driver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0bd2f0c-b713-4bff-8254-681232ac5d35/there_once_was_a_tree_a_beautiful_that_grew_in_fairyland.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/049d0573-4f05-45b2-8502-8a358c7c0b98/4450655694.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_off0000f81c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81C 5000 bytes
SHA-256: b16336135d3d73232159ecef679fc95259e6d3b14b6182da0a6353b4347c52e7
font_01_sfnt_off0001092f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1092F 13384 bytes
SHA-256: 55f9d18ce3fd38f4b2720afcf2dcc89614a74b7f4259857f90098390ed48aab8
font_02_sfnt_off00013426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13426 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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