Malicious PDF — malware analysis report

Static analysis result for SHA-256 80b04317dd144384…

MALICIOUS

PDF

74.0 KB Created: 2021-03-27 18:21:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ceb0280bfbb16edc3c00441ca966bf61 SHA-1: 944190ab078ff10e9853617932550765bccd413d SHA-256: 80b04317dd144384895fce4ca7008c0e3550a94cd0c3f15053cd74d1453e78df
196 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing lure, specifically advertising a 'bcmon apk free for android' download. The presence of a large number of external links, many pointing to potentially benign PDF files, suggests a link farm or redirection mechanism. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a payload or redirect to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://nipisod.ru/123?utm_term=bcmon+apk+free++for+android
    • https://cdn.sqhk.co/wekaradukuve/DICggqA/48732404863.pdf
    • https://togoxijagujeg.weebly.com/uploads/1/3/0/7/130775712/bifilabaf.pdf
    • http://viniveba.mywebcommunity.org/whats_the_difference_between_sig_p226_and_p229.pdf
    • https://vobelerevofago.weebly.com/uploads/1/3/4/5/134596527/5339175.pdf
    • https://sasurejif.weebly.com/uploads/1/3/5/9/135966776/6618105.pdf
    • https://pupuwovojetisig.weebly.com/uploads/1/3/1/4/131438468/fefeb.pdf
    • https://cdn.sqhk.co/noxomosanena/jjsCjhz/line_up_draw_the_criminal_online.pdf
    • https://cdn.sqhk.co/buganixezu/jiYghag/medieval_war_games_free_online.pdf
    • http://nawavidosuk.medianewsonline.com/dakofazajavuxufot.pdf
    • https://cdn.sqhk.co/gijimexuv/V3ia0gh/57922521303.pdf
    • https://cdn.sqhk.co/vizakifito/cIrjQcH/sifusasubavijilirofitana.pdf
    • https://cdn.sqhk.co/kobewudojuvo/UjaHrta/time_management_definition_webster_dictionary.pdf
    • http://bozasuramulod.22web.org/voganeximigalet.pdf
    • https://cdn.sqhk.co/viwedanej/kihmjgv/midupefegiwex.pdf
    • https://vixixufabajuwe.weebly.com/uploads/1/3/1/1/131163632/xixetorasizefewepa.pdf
    • http://kisuvok.scienceontheweb.net/jaroravezivateso.pdf
    • https://cdn.sqhk.co/bofagenined/tPSghee/tinkled_definition_verb.pdf
    • https://cdn.sqhk.co/zifeduwa/jaJ4ggG/70162323713.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://rixibedi.onlinewebshop.net/mn_rules_of_evidence_807.pdf
    • http://wifotuzo.rf.gd/pilexikotuwuzefeg.pdf
    • https://uploads.strikinglycdn.com/files/a5464d68-524c-4c36-97dd-cad1bd0bde4d/dieta_disociada_30_dias.pdf
    • https://uploads.strikinglycdn.com/files/9205a794-907b-4f55-9e45-26e39b7d9b62/costo_y_tecnicas_de_presupuesto_de_capital.pdf
    • http://fidolujure.rf.gd/87634023861.pdf
    • https://uploads.strikinglycdn.com/files/4f1031ba-605e-4585-a134-8aaf7b3b4142/best_gopro_backpack_strap_mount.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_off0000e3eb.bin
5b5a196995aae97d73a3fd4c1708bc8849c097e513c820f0c11ef74b023cc39d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3EB 5204 bytes
font_01_sfnt_off0000f58d.bin
2cc955f772b5de5f091d452c90967dcd5b0510d713fabf496e9a98d9d478b2d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF58D 10912 bytes

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