Malicious PDF — malware analysis report

Static analysis result for SHA-256 a84a4813ae9de5a7…

MALICIOUS

PDF

197.0 KB Created: 2021-03-20 07:17:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35b54d7b7bb378f3d491dd2f3c21c180 SHA-1: b0d385ca55aef56d35d0453683ac536a1efd3bfb SHA-256: a84a4813ae9de5a7ce2d1c8f1da0a5da2947fbb059eb0d1ca7a7596dbc2189a9
136 Risk Score

Malware Insights

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

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains heuristics indicating an advance-fee scam lure, suggesting the user is enticed by a prize or lottery notification. The document embeds external URIs, including a suspicious URL hosted on 'bologen.ru', which likely serves as the initial point of contact for the scam. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://bologen.ru/wix?keyword=the+fallacy+of+overgeneralization+blank
    • http://car-test.pro/venoduzododukukuk8den.pdf
    • https://cdn-cms.f-static.net/uploads/4487631/normal_600ffcf463b18.pdf
    • http://shop-you.xyz/automotive_shops_near_me_open_todayistly.pdf
    • http://viwumurowiwoba.22web.org/guia_de_canales_movistar_peru.pdf
    • https://cdn-cms.f-static.net/uploads/4449984/normal_600d08203c6b8.pdf
    • http://forecast.bet/stroke_assessment_form_physiotherapykizyu.pdf
    • http://losadodika.22web.org/metodologia_de_la_investigacion_bernal_cuarta_edicion.pdf
    • http://ritivukepexu.22web.org/jojotawelimanav.pdf
    • http://rezltml.xyz/island_adventures_whale_watching_anacortes8iqgx.pdf
    • https://cdn-cms.f-static.net/uploads/4413008/normal_601b506f5f65e.pdf
    • https://static.s123-cdn-static.com/uploads/4472775/normal_5ff249d4b0ac5.pdf
    • https://cdn-cms.f-static.net/uploads/4384633/normal_603a3df71221e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dasipidiguw.rf.gd/denejogagul.pdf
    • https://uploads.strikinglycdn.com/files/655be5f2-9a17-4f0b-b022-03ffd3fd480b/98440352797.pdf
    • http://lowazuxakosilal.epizy.com/guvonelawobi.pdf
    • https://uploads.strikinglycdn.com/files/34e4dd4c-d649-4dda-84dc-0e952564902b/who_goes_there_book_hardcover.pdf
    • https://uploads.strikinglycdn.com/files/0114cd4c-ed3a-4280-a3db-86a0d8752b5e/how_fast_does_a_yamaha_timberwolf_250_go.pdf
    • http://dibadedogiw.epizy.com/33995081030.pdf
    • https://uploads.strikinglycdn.com/files/73811169-0722-4891-a817-3482c2bc5a9c/zowubax.pdf
    • http://bajobakokela.epizy.com/sijebitamow.pdf
    • https://uploads.strikinglycdn.com/files/35ebf134-e386-4301-9b27-af08869f8244/70128126362.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_off0002cc14.bin
9e72727a239f0f7142db7034148ff98112988893fe5da42ba2fbb9fc7d951858		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CC14 5332 bytes
font_01_sfnt_off0002de4f.bin
9dbbb7df06f09c2e8561aa3f7990b7f66db2e1721e5e59459a7160527245b066		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2DE4F 12060 bytes

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