Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d226deee6fbe35b…

MALICIOUS

PDF

52.6 KB Created: 2020-04-20 12:56:05 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-15
MD5: af72b23cc338011244fc9eb60c81a78d SHA-1: 07196b69eac48f1dc67ad0f6227166ca99fa966f SHA-256: 9d226deee6fbe35bdbb5723314d49b0342ad476371ea29b14ce9eedb24f07c84
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, indicating a link farm strategy. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves directing users to external URLs, likely for SEO spam or to host further malicious content. No scripts were extracted, limiting the analysis of direct payload delivery.

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://robth3build3r.com/uploads/1/3/0/6/130639393/130639393.html#pathfinder+sorcerer+feats+guide PDF link annotation
    • http://workintel.net/uploads/1/3/0/6/130603810/nizovi_tesazerukukabi_givulalegafuje.pdfIn PDF document text
    • http://fortlinen.com/uploads/1/3/0/4/130478174/5787141.pdfIn PDF document text
    • http://animatedhobbies.com/uploads/1/3/1/0/131070202/wamoniriboxezowutegi.pdfIn PDF document text
    • http://www.classicpugspups.com/uploads/1/3/0/2/130288444/f39958.pdfIn PDF document text
    • http://newmarketprocessservers.com/uploads/1/3/1/4/131409508/225528.pdfIn PDF document text
    • http://bearcreekorganicsspa.com/uploads/1/3/0/5/130543207/xagixatagu-rolagiv-voboneme.pdfIn PDF document text
    • http://angelahoffmann.com/uploads/1/3/0/5/130550755/wamad.pdfIn PDF document text
    • http://ogdesigngroup.com/uploads/1/3/1/6/131607777/vakaz_tazoza.pdfIn PDF document text
    • http://bodygonutrition.com/uploads/1/3/1/6/131607575/rusalerilano.pdfIn PDF document text
    • http://thereccenterweekly.com/uploads/1/3/0/5/130551021/9720281.pdfIn PDF document text
    • http://chawahealthcare.com/uploads/1/3/0/7/130776132/muxewuwotujukog.pdfIn PDF document text
    • http://sheartrendz.net/uploads/1/3/1/3/131380511/koziwag.pdfIn PDF document text
    • http://mascuchfamily.com/uploads/1/3/1/4/131408169/mepojano-nebamiweroko-vojosox.pdfIn PDF document text
    • http://keeprimcountrygreen.com/uploads/1/3/0/5/130540609/425487.pdfIn PDF document text
    • http://matchacao.com/uploads/1/3/1/4/131452732/fekulonosepuwi_bajejidem_tegotavedivarog_jivikedupit.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 6

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008ce6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE6 8796 bytes
SHA-256: 47d679760f1dc81002e193f55fd596aac29f3e3f8237e17eaccbf29f63eaab40
font_01_sfnt_off0000ae89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE89 16248 bytes
SHA-256: b195ba776360337e0c8847a1f70ebf7e776628c0b6b62df72d82cae76b96cbf1

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