Malicious PDF — malware analysis report

Static analysis result for SHA-256 55b1bbfa0b986f56…

MALICIOUS

PDF

249.4 KB Created: 2021-01-22 10:08:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 6b90d0b1345f5bc98e2dc9e261b7c3c5 SHA-1: b191879a6d465991f5d65c5ad3dbaad054546a70 SHA-256: 55b1bbfa0b986f560db51f0c22bc18545f6e3d1106ec853809847319893516af
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged by a machine learning classifier and ClamAV as malicious. It contains heuristics indicating it's a lure for recovery secrets or private keys, and also suggests a password-protected archive handoff, common tactics for credential theft or malware delivery. The embedded URL points to a suspicious domain, likely part of the phishing or malware distribution chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://traffking.ru/123?utm_term=ccnp+exam+questions+and+answers+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4388048/normal_5fce454ba87c9.pdfIn PDF document text
    • https://cdn.sqhk.co/pubisifibuj/gfSSiga/descargar_mod_de_herobrine_para_minecraft_pe.pdfIn PDF document text
    • https://site-1173584.mozfiles.com/files/1173584/20548084482.pdfIn PDF document text
    • https://site-1177111.mozfiles.com/files/1177111/trouble_tanks_2_unblocked.pdfIn PDF document text
    • https://site-1176203.mozfiles.com/files/1176203/negative_numbers_worksheet_tes.pdfIn PDF document text
    • https://site-1178075.mozfiles.com/files/1178075/vegiku.pdfIn PDF document text
    • http://fulusixavopowem.iblogger.org/74904231805.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/15570784009.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/94819398978.pdfIn PDF document text
    • http://sudiwoke.epizy.com/55698633197.pdfIn PDF document text
    • http://weloridotam.epizy.com/befesadetiguzibakisudaj.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/pdf_cdf_continuous_random_variable.pdfIn PDF document text
    • https://s3.amazonaws.com/panokojol/91964678513.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/37808975140.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00038faa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x38FAA 2968 bytes
SHA-256: abee2b393ec2fb9fec7f30c584fa7e125e99fd0856e0afbe60a6d6a568499c8d
font_01_sfnt_off00039a4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x39A4F 5460 bytes
SHA-256: b5af090eced72ee1013d4b4a2dfbde21116514fe92a8dbc0c772d51be8e224f0
font_02_sfnt_off0003acdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3ACDD 12448 bytes
SHA-256: df067326fe0608d02c9982f01180d8b4edc0aaf436a97c69082c1703657a19c5

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