Malicious PDF — malware analysis report

Static analysis result for SHA-256 a11e4130b278c673…

MALICIOUS

PDF

94.0 KB Created: 2021-03-15 19:30:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9206524e8bd58a3f569231e7df085a42 SHA-1: 7ffcf17f80d59c082c09f135158ab00e042546ed SHA-256: a11e4130b278c673b2b308d52eb9d0a3c6c8a8dd0ac2b1218c7d779250ee6d92
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 URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains text related to the URI, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://mezovuduw.ru/award?keyword=english+alphabet+pronunciation+in+bangla+pdf
    • https://gijagexerifaru.weebly.com/uploads/1/3/5/3/135322880/leletegezi-nenov-ladisabuse.pdf
    • https://cdn.sqhk.co/favosejo/ggqunRw/neon_health_miles_ave.pdf
    • https://cdn.sqhk.co/vamapoludi/GiiicDk/takap.pdf
    • http://tikanaw.mypressonline.com/3d_cell_culture.pdf
    • http://tapagigozi.medianewsonline.com/zitefojosoxifubobotifomaw.pdf
    • https://pumagawiluzade.weebly.com/uploads/1/3/4/6/134697536/7893393.pdf
    • https://zukutalemuz.weebly.com/uploads/1/3/4/5/134582669/nuvopi.pdf
    • https://sazojowob.weebly.com/uploads/1/3/4/3/134351878/17c96d562ab5b.pdf
    • https://cdn.sqhk.co/xavaxonad/cgftggg/new_infection_rate_london.pdf
    • https://gawozigojuvapa.weebly.com/uploads/1/3/4/8/134896601/4478053.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sumesawoxajew/24038699725.pdf
    • http://wujagenak.atwebpages.com/rainer_maria_rilke_book_of_hours_love_poems_to_god.pdf
    • https://s3.amazonaws.com/gotenukevepunin/rilexuwasufadazo.pdf
    • https://s3.amazonaws.com/lijopavexanuse/report_lost_septa_key_card.pdf
    • https://uploads.strikinglycdn.com/files/3b34765c-e2a7-461c-b5dc-5994fe10beeb/vet_science_cde.pdf
    • https://uploads.strikinglycdn.com/files/8b632bc2-cb5a-446d-9c1a-7f0c667a38ba/36283366792.pdf
    • http://zelimasiropaf.epizy.com/i_never_sang_for_my_father_monologue.pdf
    • http://watafas.rf.gd/suxukavuneparurezaj.pdf
    • https://uploads.strikinglycdn.com/files/7a4e8925-f0f2-47af-8639-1ecd3ba7db11/3_phase_transformer_examples.pdf
    • http://nibubatovavav.atwebpages.com/kezubosinuxejejamizivub.pdf
    • https://uploads.strikinglycdn.com/files/6ea33460-0fbd-4389-a165-48dab3706a7b/61054650586.pdf
    • https://s3.amazonaws.com/fogibi/ipod_nano_7th_generation_price_in_india.pdf
    • http://wonumamirevaz.rf.gd/how_to_do_a_job_interview_with_social_anxiety.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://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010362.bin
87c57a3345a50443bed4070de561cc8417875958bfd5c65bd034feff1fe00fdd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10362 5512 bytes
font_01_sfnt_off00011614.bin
ea5777daed97d4a34330f329bad963002bc18b8e316a4cda684e36d914262ca0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11614 12552 bytes
font_02_sfnt_off00013bef.bin
e3c6f8dd8c0f87692e44d4dfeb1ca041d1ff56eb00bb563443fc6a063e47730f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13BEF 14384 bytes

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