Malicious PDF — malware analysis report

Static analysis result for SHA-256 372e1415749ceec2…

MALICIOUS

PDF

73.9 KB Created: 2021-03-28 16:54:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8a767242c92dc28d07d7bd0a168299a SHA-1: 7facfbcf9f357bef93b4eae44e958408f4f3add9 SHA-256: 372e1415749ceec20745e8d48937eb3e35267d07710fffc63697a8e66817b860
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. An embedded URI points to a URL that appears to be a lure for printer troubleshooting, likely a phishing or malware distribution site. No scripts were extracted, but the presence of an external URI suggests a malicious intent to redirect the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://kuzutuzo.ru/strik?utm_term=brother+hl-2140+drum+error+reset
    • http://tedurelaseji.mygamesonline.org/mithun_rashi_name_list_gujarati_girl.pdf
    • http://sesizuxewewax.mygamesonline.org/latin_key_to_better_english.pdf
    • http://wejowadizabudex.mypressonline.com/graco_pack_and_play_sheet_size.pdf
    • http://xogavuw.medianewsonline.com/66790095694.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/fdb46164-a85f-4c95-87ac-8e3c67aef64f/58563717734.pdf
    • https://uploads.strikinglycdn.com/files/599dca59-0115-452e-9ca9-bc24e596898c/david_poole_linear_algebra_4th_edition_solutions.pdf
    • https://s3.amazonaws.com/lekizopiloref/bijakenuvemonodixurex.pdf
    • https://7ffe38df-ef78-47a1-8632-a9c579db478a.filesusr.com/ugd/8ff694_734b949549f445d2974fc4168a17bb1d.pdf?index=true
    • https://s3.amazonaws.com/wupagivoz/rojitatoziwajoriwiz.pdf
    • https://s3.amazonaws.com/radubozufiwo/honeywell_hcm_350_-_best_buy.pdf
    • https://s3.amazonaws.com/dosipive/29545649732.pdf
    • https://uploads.strikinglycdn.com/files/2e74d8d3-49b9-42a4-a5e2-8f64b33c048e/72441707900.pdf
    • https://8860adff-7f0b-4cf3-a358-cdd560dff136.filesusr.com/ugd/625844_8d94bb5f4a4d43da8247967b90a88ccb.pdf?index=true
    • https://uploads.strikinglycdn.com/files/518db1ec-a40f-4132-984d-30b2d88f2df2/21083182200.pdf
    • https://uploads.strikinglycdn.com/files/647925d5-372c-40a7-85f0-1ca6ed228445/75903837700.pdf
    • https://uploads.strikinglycdn.com/files/1cc10bca-86d8-4ea0-aa00-1651b818ff52/vivemujap.pdf
    • https://1c514d3f-4aca-4c14-a2cc-94ef866bc6c7.filesusr.com/ugd/860217_49f61b1186094101a4df1ed5d5c3bad2.pdf?index=true
    • https://s3.amazonaws.com/vonutavekip/23565167560.pdf
    • https://s3.amazonaws.com/toguvaju/85372773002.pdf
    • https://4228e3e8-6e56-436b-9c2a-5710a6c3a216.filesusr.com/ugd/e32dc8_671a774e73f5488aa6ef54989318c46a.pdf?index=true
    • https://s3.amazonaws.com/senodiw/what_are_the_consequences_of_climate_change_wikipedia.pdf
    • https://uploads.strikinglycdn.com/files/5ed39f49-1aa2-4634-8271-b71251bf58f7/examen_diagnostico_historia_de_mexico_secundaria.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e488.bin
a0e52ad4c7ee794cc32fe256d766774aa7077c2d04224773071342caa371743f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE488 5348 bytes
font_01_sfnt_off0000f6a1.bin
41e41486a905cf2c875ccb3a1994f893dbc1a9716168147e7931548b871d5785		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A1 10300 bytes

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