Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcb4073c4c1ee842…

MALICIOUS

PDF

84.8 KB Created: 2021-03-25 12:51:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc565992f7b58c0ac40b0c443e42dbfc SHA-1: d91dac9ab433b8fa5dd4c4a14e18afa983573cab SHA-256: bcb4073c4c1ee8423fa14ce5c114e33491cd8a66dfdeaf043d442cc3432f74bc
96 Risk Score

Malware Insights

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

The PDF file contains a URL that appears to be a lure, directing users to a site that likely hosts malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/award?keyword=anandamath+pdf+in+english
    • https://cdn-cms.f-static.net/uploads/4465249/normal_603ee07eb1bf5.pdf
    • https://cdn-cms.f-static.net/uploads/4394061/normal_5fd3dced976ed.pdf
    • https://cdn-cms.f-static.net/uploads/4450732/normal_603ad1a8170d0.pdf
    • https://cdn-cms.f-static.net/uploads/4465252/normal_604b52f65827f.pdf
    • https://static.s123-cdn-static.com/uploads/4403541/normal_5fcb014ba79ba.pdf
    • https://static.s123-cdn-static.com/uploads/4501385/normal_5ffc1cdf16a2e.pdf
    • https://static.s123-cdn-static.com/uploads/4410416/normal_5ff2bd7cb52bb.pdf
    • https://cdn-cms.f-static.net/uploads/4370740/normal_60127b652bcda.pdf
    • https://cdn-cms.f-static.net/uploads/4388432/normal_6013322bb358e.pdf
    • https://static.s123-cdn-static.com/uploads/4487381/normal_5fc6f180d5ec2.pdf
    • https://cdn-cms.f-static.net/uploads/4366653/normal_60534b1adda7b.pdf
    • https://cdn-cms.f-static.net/uploads/4444358/normal_603274b6c4ce8.pdf
    • https://cdn-cms.f-static.net/uploads/4477878/normal_601a164faf3ed.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/4edfdd67-30d3-49c2-82ae-22998be11088/guwapovuzijotojovi.pdf
    • https://uploads.strikinglycdn.com/files/afedb7e8-36ba-4452-8b90-61a1251244ec/lyrics_five_nights_at_freddys_2_song_-_the_living_tombstone.pdf
    • https://uploads.strikinglycdn.com/files/9d7ca379-863b-4f4b-95cf-8fe0c408e32b/nutone_intercom_system_with_cd_player.pdf
    • https://uploads.strikinglycdn.com/files/75ff3386-b021-4f08-a059-d50cdec942fc/gevexapawobenovu.pdf
    • https://uploads.strikinglycdn.com/files/da42e6e5-f878-4130-ad59-8b6b6a90166d/zazimezanoveri.pdf
    • https://uploads.strikinglycdn.com/files/61abe2d0-b2fc-49b3-9be1-66fde04b4af2/ziwutebi.pdf
    • https://uploads.strikinglycdn.com/files/5d191076-d7e8-48f5-b7c9-33b1377c435b/sofifupagagilojufidazaj.pdf
    • https://uploads.strikinglycdn.com/files/4f8ae1e4-ca9e-4a89-acba-aae2245e4db1/togarashi_mayo_recipe.pdf
    • https://uploads.strikinglycdn.com/files/2bd464af-0264-498d-826b-c186329df731/house_of_leaves_ending_reddit.pdf
    • https://uploads.strikinglycdn.com/files/79281a44-c9cd-47d2-a5df-c4b544966c0f/discourse_on_inequality_and_social_contract.pdf
    • https://uploads.strikinglycdn.com/files/1ee9f044-c418-4676-bdb6-f3846fada56d/54413395082.pdf
    • https://uploads.strikinglycdn.com/files/cc79bea8-3467-41bd-9e0a-37169c428fa1/45367953415.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010304.bin
534a9a2faeab3bd95d641880774272a2aa5460b3303414d5e8fa8324e25fbec9
pdf-font-stream PDF embedded font (sfnt) at offset 0x10304 5028 bytes
font_01_sfnt_off000113ed.bin
83e5377c5c1a5a262354600bfb7bf0c734b9bad71e9b61a2fd8d262160c3523f
pdf-font-stream PDF embedded font (sfnt) at offset 0x113ED 10400 bytes
font_02_sfnt_off0001375d.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x1375D 4324 bytes