Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbbfd110d77e136c…

MALICIOUS

PDF

103.1 KB Created: 2021-03-22 19:15:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0459be02632faa39b67b472b84262d10 SHA-1: 56ffde06c7553e74686e99c2b326a5e95aefe613 SHA-256: bbbfd110d77e136c509f604e4e8c70535ac3d5048625d7c31780fa1f35bf21b2
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely to host a malicious payload or phishing page. The document body, though heavily obfuscated, contains text related to 'spoken english application' and 'wkhtmltopdf', suggesting a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://lozipotod.ru/123?utm_term=spoken+english+application
    • https://jotavitot.weebly.com/uploads/1/3/0/7/130738821/5c300347531e721.pdf
    • https://static.s123-cdn-static.com/uploads/4417419/normal_6000317ce07a7.pdf
    • https://cdn.sqhk.co/naxokujim/gMiiQgf/how_to_bake_salmon_fish_cakes.pdf
    • https://gedarimetesuja.weebly.com/uploads/1/3/1/3/131398281/720106.pdf
    • http://mezapadanufelon.iblogger.org/546360395.pdf
    • https://cdn-cms.f-static.net/uploads/4389805/normal_5fe8edac7a980.pdf
    • https://static.s123-cdn-static.com/uploads/4388422/normal_5ff0f08d8520e.pdf
    • https://cdn.sqhk.co/xidafigutoxa/hij4jbt/stickman_survival_battlefield_games.pdf
    • https://cdn-cms.f-static.net/uploads/4425506/normal_602237a229b9e.pdf
    • https://cdn.sqhk.co/gitopedevid/Xe6sq9L/kaxumitefajuj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://sogewom.rf.gd/the_trial_kafka_movie_1962.pdf
    • http://saripugoxek.rf.gd/22069216366.pdf
    • https://87c8fc71-818b-4167-bf0d-2ac3bc49ffd1.filesusr.com/ugd/f9d4cd_ec1d42ba83634c3a9f53cb7a7c14fe69.pdf?index=true
    • http://mujawonevafo.rf.gd/tafazetir.pdf
    • https://s3.amazonaws.com/webipejonavuv/88517361889.pdf
    • https://s3.amazonaws.com/mexijegedakol/master_forge_5_burner_grill_drip_pan.pdf
    • https://67dec473-0a9c-497c-80b1-62a4c84c5046.filesusr.com/ugd/0aab01_7f65f77a5e5b4be8be5e741b9c41e321.pdf?index=true
    • https://5e1449e8-5ae4-4a15-bc7a-ee23795bc964.filesusr.com/ugd/3a34a5_652ece74410b43f8b3d65196089b8b00.pdf?index=true
    • https://11e0ccb5-01dd-4757-ae93-f6f3b4f5ca32.filesusr.com/ugd/1a2ce6_eaa5006737314ecea3eb0a4ec3e68787.pdf?index=true
    • https://s3.amazonaws.com/zoluwivebiro/98028837870.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012793.bin
ffa059b556e52b1b6f05ec92219b46f295aa268d89ab7d60b92022e84873a872		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12793 3140 bytes
font_01_sfnt_off00013292.bin
d5a4822bfffde0d0866cec63c132725c462cb105c1ba5fe5aab6296c67c37bdb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13292 5056 bytes
font_02_sfnt_off000143bc.bin
74b16e6510f27e054d3751d1624da4b22e835c5d1ada7932a9c179e797e24877		 pdf-font-stream PDF embedded font (sfnt) at offset 0x143BC 11544 bytes
font_03_sfnt_off00016ab9.bin
532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16AB9 16204 bytes
font_04_sfnt_off00017fe9.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17FE9 4324 bytes

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