Malicious PDF — malware analysis report

Static analysis result for SHA-256 86f7b761fb4d3b23…

MALICIOUS

PDF

81.0 KB Created: 2021-04-03 12:18:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 4cf4e634c27ea542ac6f5b3a9d12d1de SHA-1: 1f15c969fb22c5b1243661b85a382b65fd811573 SHA-256: 86f7b761fb4d3b2330723bdc79e451f39dbb2149c93fbdd6d4b2f919c906f748
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to trick the user into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://xezojetit.ru/award?keyword=naca+aerofoil+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4463552/normal_5ff1e7b40122c.pdfIn PDF document text
    • https://cdn.sqhk.co/fonizijodi/DVidzja/notepad_compare_plugin_64bit_github.pdfIn PDF document text
    • https://cdn.sqhk.co/sesijisova/ieQAyhh/wovedalaganadariladewux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408476/normal_604e5a0a8d558.pdfIn PDF document text
    • https://cdn.sqhk.co/nojebimit/dggL5k4/tuner_metronome_soundcorset.pdfIn PDF document text
    • https://cdn.sqhk.co/mogidamiko/GsJhj7e/steampunk_tower_defense_hacked_unblocked.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462073/normal_5fdabe2fce564.pdfIn PDF document text
    • https://cdn.sqhk.co/vozaxodep/hhtHLha/twist_and_shout_music_score.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489409/normal_5fc61e15639c6.pdfIn PDF document text
    • https://cdn.sqhk.co/zekafomaze/HhjkPhh/77625280254.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411686/normal_60462c583f7ea.pdfIn PDF document text
    • http://mupifojoxur.medianewsonline.com/podibasifaze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384142/normal_60134db2b9961.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376382/normal_60086f86b6b46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385235/normal_602055277da5f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424043/normal_5fe4c5d89bd4e.pdfIn PDF document text
    • https://cdn.sqhk.co/naxiwakiwuv/9hhggia/falling_waters_wv_things_to_do.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383679/normal_5ff2f05db7a12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378161/normal_604186a8c8442.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dapibudajemuk.atwebpages.com/49171255261.pdfIn PDF document text
    • http://furunes.onlinewebshop.net/canon_digital_rebel_xt_price.pdfIn PDF document text
    • http://zagofij.onlinewebshop.net/can_you_make_whiskey_in_a_reflux_still.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e90d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90D 4940 bytes
SHA-256: b650b5f4c695400f5be69a6108ba00bd8ac25b49336c08f08ab58a1afff963f7
font_01_sfnt_off0000f9ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EE 11656 bytes
SHA-256: 693fa4dc4727a7413e2fd02b50b4408fec5dfdab9abdf7cb7dea006510288130
font_02_sfnt_off0001222d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1222D 16036 bytes
SHA-256: 354dce64f07f3d7acdf6a04edf763950ffbfec4edcbb4bfe17b65a83544077bb

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