Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd6094bbace834cc…

MALICIOUS

PDF

36.9 KB Created: 2020-03-30 12:50:55 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 32b1d12e7015b7761f8b3b02896da851 SHA-1: 7448ac395c4bbe41fed60e970a537876c158e663 SHA-256: bd6094bbace834ccac751ec4590d9983807efe66f2369d97859301202517f9fb
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a large number of external links, many of which are numerically or generically named, suggesting a link farm or SEO poisoning tactic. The document body, though partially corrupted, contains a URL related to 'storage cabinets for flammable liquid containers', which likely serves as a lure to direct users to malicious websites. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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 http://us.momotombochocolatefactory.com/uploads/1/3/0/8/130814042/130814042.html#storage+cabinets+for+flammable+liquid+containers
    • http://justfrostedbakingco.com/uploads/1/3/0/3/130323510/kofasax.pdf
    • http://foreverplay.org/uploads/1/3/0/2/130288431/0b7c891cda4ee6.pdf
    • http://especialgenius.org/uploads/1/3/0/9/130969854/lokegijomuwojor-mekavon-bomam-giwazemodajibaj.pdf
    • http://simscambodia.com/uploads/1/3/0/3/130323567/4d96cc83869.pdf
    • http://remote.bbmaint.com/uploads/1/3/0/8/130874257/a2844f23a7.pdf
    • http://bibbyschocolate.com/uploads/1/3/0/9/130969850/6740148.pdf
    • http://mail.veroniquevanduurling.com/uploads/1/3/0/8/130874001/5054621.pdf
    • http://sngprinting.com/uploads/1/3/0/5/130590469/b4d43fc5.pdf
    • http://lesehanker.com/uploads/1/3/0/6/130603709/3828930.pdf
    • http://mydoctt.com/uploads/1/3/1/3/131380591/bawejawisid_gonalavesoxog.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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064c6.bin
ca3c7570cf456ce9c467d9c85aae8b9583e03ec1eb6051a01972080cfeaa8fa7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64C6 8276 bytes

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