Malicious PDF — malware analysis report

Static analysis result for SHA-256 88e258d55208d4e4…

MALICIOUS

PDF

34.3 KB Created: 2020-05-13 00:38:54 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 135d41329e1187a0ad485f2a8641ff45 SHA-1: dc5e1833134b97e4a2a6044ad185416936f02155 SHA-256: 88e258d55208d4e4ffe1cffcf836d7ac2c96de60f9a87b2346aac054c9c5ec86
94 Risk Score

Malware Insights

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

This PDF contains a large number of external links, a technique often used for SEO manipulation or to distribute further malicious content. The ML classifier strongly indicated maliciousness. The primary attack pattern involves directing users to a farm of websites, with the specific intent likely being SEO spam or a phishing lure, though no specific payload was identified in this stage.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://pattersonagency.us/uploads/1/3/1/6/131606598/131606598.html#seed+germination+temperature+lab+report
    • http://linenlikebyhoffmaster.com/uploads/1/3/0/5/130550794/3f8778f1ffad91.pdf
    • http://ideaincubator.biz/uploads/1/3/0/7/130776416/a519bdbc06825.pdf
    • http://cobberdoglabradoodle.com/uploads/1/3/0/6/130621643/xukivagip.pdf
    • http://sheilasauvageau.com/uploads/1/3/0/9/130969727/2477016.pdf
    • http://tradetilingroup.com/uploads/1/3/0/2/130272084/gutotipejoz.pdf
    • http://biasedentertainment.com/uploads/1/3/1/4/131437160/15ad5e1.pdf
    • http://madpipers.com/uploads/1/3/1/3/131398405/31fd718c0dc.pdf
    • http://longfordgardencentre.net/uploads/1/3/0/9/130969229/66c9802d.pdf
    • http://efficientandcreativeorganizers.com/uploads/1/3/0/7/130739750/11902abde6b07d.pdf
    • http://lililalune.com/uploads/1/3/0/2/130274301/3787763.pdf
    • http://harrismanagement.us/uploads/1/3/0/2/130272290/e5e5477182627a9.pdf
    • http://moochieandsissy.com/uploads/1/3/0/6/130621477/2292634.pdf
    • http://galovilchescabrera.ca/uploads/1/3/0/4/130435930/2734353.pdf
    • http://mylemakingyourlifeeasier.com/uploads/1/3/1/3/131383439/b0118d7586f84.pdf
    • http://michaelanthonytorres.com/uploads/1/3/0/6/130605084/jakularivarumekiduw.pdf
    • http://mantitec.com/uploads/1/3/1/0/131070525/1149016.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_off00005c08.bin
a01917f8932fed1018d0078fc6f671757e3f966156ea92d2635b11d7ea3e33f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C08 9784 bytes

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