Malicious PDF — malware analysis report

Static analysis result for SHA-256 9269a1d885c2c5af…

MALICIOUS

PDF

33.6 KB Created: 2020-04-12 06:24:25 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ca0aca4bed9c6e72445fec8a2ee6265e SHA-1: c3d1bce2572dd36e9ab01834cabd7f3ce1ab5182 SHA-256: 9269a1d885c2c5af7e81c5802cef07fbb4d941d13dfd04c0228c17dab9bc8a17
94 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm or SEO spam, containing a large number of external links to other PDF documents hosted on various domains. The ML classifier strongly indicated maliciousness. The primary attack pattern involves directing users to a network of external URLs, potentially for distributing malware or engaging in phishing activities. 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://roadshowarchitects.com/uploads/1/3/1/0/131070926/131070926.html#justrite+flammable+cabinet+manual
    • http://edmontoncompressionstocking.com/uploads/1/3/0/6/130605421/gijibiwigenu.pdf
    • http://abettergoodbye.net/uploads/1/3/0/2/130287419/b02b10353.pdf
    • http://mainstayprivateresort.com/uploads/1/3/1/3/131398461/1635531.pdf
    • http://siobhanartandecology.com/uploads/1/3/0/9/130968968/ropozatopabur_jesedomugaj_wekoxuwanowexaj.pdf
    • http://interspan.solutions/uploads/1/3/0/7/130739891/5768555.pdf
    • http://medleadershiptjohnson.com/uploads/1/3/0/6/130639699/paxenubifo.pdf
    • http://slingandstone.us/uploads/1/3/0/5/130550781/jomapop-xamuxowigaf.pdf
    • http://citizenimmigrant.com/uploads/1/3/1/6/131637640/f31a84cb16e00fb.pdf
    • http://bensmith.us/uploads/1/3/1/4/131407459/4391636.pdf
    • http://tilthoops.com/uploads/1/3/1/0/131071056/nenomumitim_retonikuvijude_xorerodosimomi.pdf
    • http://butchangel.com/uploads/1/3/0/5/130590298/dijubegeropelozis.pdf
    • http://vafarihomes.com/uploads/1/3/0/8/130814200/zukisa.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_off00005b9f.bin
a93d05c9016adb66f8707a1a97ec2b8208310b10d27e993691446d6cef586730		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B9F 7956 bytes

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