Malicious PDF — malware analysis report

Static analysis result for SHA-256 db49e239c6f973f6…

MALICIOUS

PDF

89.1 KB Created: 2021-03-16 18:30:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 124fa92f65c0cffe8672af631b9e0bfc SHA-1: 7bdf1e1256f3336c166c30b1c9655d8fc2ea7940 SHA-256: db49e239c6f973f6aac94290dce4c833a6bcc6a350d40bb0c1bdbd4fe5ddddc7
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Phishing: Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious. Heuristics indicate it attempts to trick the user into executing commands via the clipboard and suggests a password-protected archive, pointing towards a multi-stage infection. The embedded URL and numerous other URLs hosted on suspicious domains suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://dafemum.ru/123?utm_term=windows+xp+booting+software
    • http://cooldomen.space/dakanotetekalexaj7df7w.pdf
    • http://cheapkeys.site/bomeseduzugigaso0n8k8.pdf
    • https://cdn-cms.f-static.net/uploads/4450639/normal_600e4600b9550.pdf
    • http://tehnikator.ru/punilepezesumapunawulavaoq13f.pdf
    • https://cdn-cms.f-static.net/uploads/4476954/normal_605068af3c393.pdf
    • http://goossyy.online/str_dn1080_best_settings9kin8.pdf
    • http://russianpatentexpert.com/25315229300h7ryi.pdf
    • https://cdn-cms.f-static.net/uploads/4417139/normal_600bcaa244641.pdf
    • http://dektesheff.xyz/manual_chiller_carrier_30rb_espaolairj9.pdf
    • https://cdn-cms.f-static.net/uploads/4488822/normal_60374cdb07966.pdf
    • https://cdn-cms.f-static.net/uploads/4375891/normal_604920b493e75.pdf
    • https://static.s123-cdn-static.com/uploads/4405208/normal_5ff410874a20c.pdf
    • https://cdn-cms.f-static.net/uploads/4466153/normal_604e2351d8512.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/jixerubowi/bavepetimisivita.pdf
    • https://uploads.strikinglycdn.com/files/5044dbfa-e286-425a-939b-d4e7f379910f/hoover_smartwash_carpet_cleaner_brushes_not_turning.pdf
    • https://s3.amazonaws.com/tibanepoxilibud/torexibufote.pdf
    • https://s3.amazonaws.com/senodiw/rubivuxujixikibo.pdf
    • https://s3.amazonaws.com/vixuwogetiv/synthetic_leather_fabric_sheets.pdf
    • https://uploads.strikinglycdn.com/files/18ec0a23-d576-4b28-a871-cf4f1b97cbc8/the_100_startup_book.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000112b8.bin
eeb0e262b21f1d999cc5af97277359e550a103567d3f21fa26d8e35dfc676672		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112B8 5280 bytes
font_01_sfnt_off000124d0.bin
6ef623ff7a02bbd9b8e978107b42ad49ecc60f486b63b3095daa6ea158c4b064		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124D0 10672 bytes
font_02_sfnt_off0001492a.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1492A 4324 bytes

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