Malicious PDF — malware analysis report

Static analysis result for SHA-256 542b68da46ce995c…

MALICIOUS

PDF

39.7 KB Created: 2020-03-31 05:46:06 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-04
MD5: 46208fb08f136fee2c38820c7b004b22 SHA-1: 8065d1a14e963c86a21c745b9006d1c4525641f4 SHA-256: 542b68da46ce995c61f24cbdd28284cd6a8fe56bd32ac2177a61993de100b27e
96 Risk Score

Malware Insights

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

This PDF document employs a link farm technique, embedding numerous external URLs within its body. The primary lure appears to be a "pizza special" to entice users to click on these links. The document's structure and the sheer volume of outbound links suggest an attempt to manipulate search engine results or direct users to malicious content hosted on various domains.

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://rutgerscybersecurity.com/uploads/1/3/0/6/130605194/130605194.html#kum+and+go+friday+pizza+special PDF link annotation
    • http://amycstapleton.com/uploads/1/3/0/2/130272361/pulapaw.pdfIn PDF document text
    • http://yankemfishinggear.com/uploads/1/3/0/2/130270776/d52161.pdfIn PDF document text
    • http://julyisfreedom.com/uploads/1/3/0/4/130476266/6943710.pdfIn PDF document text
    • http://visual-career-guides.com/uploads/1/3/0/5/130589244/bumuxufavaduva-mizagabu.pdfIn PDF document text
    • http://epimaxusa.com/uploads/1/3/0/7/130739330/getalo.pdfIn PDF document text
    • http://astylemag.com/uploads/1/3/1/3/131380908/jufesibad_losabux_domer_sezotopilod.pdfIn PDF document text
    • http://gabelidigital.com/uploads/1/3/0/5/130540063/989125.pdfIn PDF document text
    • http://zacwynnrealtorguy.com/uploads/1/3/0/8/130813797/mimepas.pdfIn PDF document text
    • http://threepointclub.info/uploads/1/3/0/3/130313314/vakakenofidewal_dezev_wafuwu.pdfIn PDF document text
    • http://aucourantimage.com/uploads/1/3/0/6/130620612/parifukano.pdfIn PDF document text
    • http://magictel.net/uploads/1/3/0/4/130488619/ketewet.pdfIn PDF document text
    • http://enlivenwall.com/uploads/1/3/0/6/130620529/8b5fbb5a7a.pdfIn PDF document text
    • http://alta-prorealty.com/uploads/1/3/0/6/130605112/17f3d8f6b.pdfIn PDF document text
    • http://host67-131-77-221.static.ahcnm.org/uploads/1/3/0/2/130272440/8568625.pdfIn PDF document text
    • http://cemprosystems.com/uploads/1/3/0/6/130604672/2c30d90.pdfIn PDF document text
    • http://starspangledbrewing.com/uploads/1/3/0/5/130540814/pililazalo.pdfIn PDF document text
    • http://feelinggoodis.com/uploads/1/3/0/6/130604497/kavoronev.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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7250 8068 bytes
SHA-256: 74ce68608b7f899371bdbb7510f86a13f32198fd7a6e4e1a1aacf838b320f849