Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b6e5c8b52441c6a…

MALICIOUS

PDF

141.7 KB Created: 2021-05-22 23:02:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: ac2fad8404142e0368d079290a90728f SHA-1: 162b3d6f84463807997b0c29dba24d76999fba08 SHA-256: 7b6e5c8b52441c6a36b67428345feb990dbbac64d6742278b633a0b4b29df825
96 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, specifically flagged as Pdf.Phishing.Trojan. The embedded URL points to a suspicious domain, likely serving as a lure for phishing or to download a secondary payload. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://fokemale.ru/strik?utm_term=is+it+love+drogo+walkthrough+chapter+1 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375209/normal_60608b51691c4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393521/normal_60089a0a3cb21.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450636/normal_5fe52f7373227.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466379/normal_60340bd2ae205.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465142/normal_6061a050653bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480182/normal_605c600497be3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456663/normal_5fefc5ad62f71.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/pusolefosex/52029204865.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/powerman_5000_when_worlds_collide_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5314dfcf-7fa1-4f5d-8861-81a2e5b282d6/dark_tower_board_game_release_date.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/jemuf.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/basic_welding_skills_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fb36545-b5c1-43c9-9747-fbd1eeb42e39/xulapogowefoluwiz.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/boston_s_alliance_leveling_guide_20-_30.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81f42915-153d-4f6d-92f7-fac86de0efe6/subnetting_examples_with_answers_and_explanations.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fdf7e8b-7aa5-44f1-bc67-44b6e9c6f554/physics_for_scientists_and_engineers_9th_edition_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f91a6383-ae59-4727-902e-084f8f6eb713/free_printable_first_grade_sight_words_worksheets.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001d006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D006 5540 bytes
SHA-256: 600384be773cb14ace78bb78652a0b1d3b7cc7348b8b18e6b8c69e829dab9f12
font_01_sfnt_off0001e2eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E2EB 2044 bytes
SHA-256: e8def34ef7fa1cd1e737aa53281a1ad4be732a20e453453846aa670fb207f4af
font_02_sfnt_off0001ec58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EC58 11272 bytes
SHA-256: 573a394e56da81d2245d7b1db6da4b4e537586c130fae553889fedad0349ea08
font_03_sfnt_off00021261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21261 16140 bytes
SHA-256: 5bfda07072dd2e1b0df7f1680a75ba616774ec51e1a09c257f000ba239241e1c

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