Malicious PDF — malware analysis report

Static analysis result for SHA-256 bda0c0c91487fe1e…

MALICIOUS

PDF

48.0 KB Created: 2020-04-04 14:55:56 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 8140d01774e3231c249a2696db001f17 SHA-1: bed2ecb1ed4dd0c87a94ea90bfa582671a1a3208 SHA-256: bda0c0c91487fe1eab4f5ec9d07a19537adc2210e91ee735e1a292aef4f817ec
96 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified as a PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a tactic to manipulate search engine results or distribute content. The document body itself is heavily obfuscated but contains references to the URLs, indicating a deliberate attempt to direct users to these external resources. No scripts were extracted from this sample.

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://iweargreatness.com/uploads/1/3/0/7/130776125/130776125.html#2019+ap+calculus+bc+free+response+solutions PDF link annotation
    • http://theclaytonconnection.com/uploads/1/3/0/6/130603698/pujix.pdfIn PDF document text
    • http://dantechconsultant.com/uploads/1/3/1/0/131070918/6636053.pdfIn PDF document text
    • http://warlockstaleofficial.com/uploads/1/3/1/0/131070791/f09fef3.pdfIn PDF document text
    • http://24oakst2.com/uploads/1/3/0/4/130435947/2213642.pdfIn PDF document text
    • http://modelnoelle.com/uploads/1/3/1/4/131409761/a26ff0ab.pdfIn PDF document text
    • http://ginzayalamirada.com/uploads/1/3/1/1/131164431/1b0b5392b0.pdfIn PDF document text
    • http://liveoffended.org/uploads/1/3/1/4/131482915/fenamixasimole.pdfIn PDF document text
    • http://jefpersonalisedgifts.com/uploads/1/3/0/8/130813077/tejarasazuziwo_dujojuworuju_jagag_dirogupume.pdfIn PDF document text
    • http://frontierbuilders.org/uploads/1/3/0/7/130776260/5c75eda.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
🗂 Part of campaign: octarinesec.com 13 samples

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_off000071b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71B4 8432 bytes
SHA-256: 9024bfcf723b267806a3b223c2ae8d1318e526556fa39eceaaf8f026710146db
font_01_sfnt_off0000926b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x926B 2988 bytes
SHA-256: 6e2afe4324691a3c3a71b7653f03a4a599aa7dc33e86dd02acce13a6881b843a
font_02_sfnt_off00009cf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CF9 16204 bytes
SHA-256: f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d

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