Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa074484491b0e4f…

MALICIOUS

PDF

38.2 KB Created: 2020-04-09 01:01:59 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: de3110f09f7bcf390075bd013b0f334b SHA-1: 4ae2bbb852ae451b61f5ee7f3db67d0b75607894 SHA-256: fa074484491b0e4fd0023ab6e2803280dab27055f728b834de813e8dd3ce10a3
94 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier with high confidence as malicious. It contains a large number of external links, indicating a link farm or redirection scheme. The primary attack pattern appears to be the distribution of malicious links, likely leading to phishing or malware download sites. No scripts were extracted, and the document body contained mostly obfuscated or metadata-related content.

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://spillerwilliams.com/uploads/1/3/0/2/130289754/130289754.html#mtg+innistrad+block
    • http://matilijajuniorhighpto.org/uploads/1/3/0/7/130739945/4165730.pdf
    • http://centreiceinvestments.com/uploads/1/3/0/7/130738622/298f7564.pdf
    • http://yoga4kids.nl/uploads/1/3/1/4/131452803/fabakeguz_rewixinodipale.pdf
    • http://smartupfinance.com/uploads/1/3/0/6/130639887/vadurowo.pdf
    • http://buildamerica2020.com/uploads/1/3/0/4/130483285/2aa4775.pdf
    • http://simplycrafted.us/uploads/1/3/0/8/130814347/fafezojo_lavibidipep_javefejajuref.pdf
    • http://lohtest.com/uploads/1/3/0/6/130605447/vulasadanekiv-mutexazix-linaloza-tonejedebi.pdf
    • http://contacthomefirst2017.com/uploads/1/3/0/7/130739159/laraxepeda.pdf
    • http://kellymurphyteam.com/uploads/1/3/0/5/130550912/428dfb8b3356.pdf
    • http://jrwconsulting.services/uploads/1/3/1/3/131380445/4786644.pdf
    • http://drumtron.com/uploads/1/3/1/4/131436997/a6059d873969.pdf
    • http://sweetveras.com/uploads/1/3/1/1/131163851/3284073.pdf
    • http://bebundled.com/uploads/1/3/0/5/130589010/dbe81a.pdf
    • http://blackboardbuddy.com/uploads/1/3/0/9/130969334/4345855.pdf
    • http://bryanrazo.com/uploads/1/3/0/5/130547150/9483225.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_off00006d5f.bin
ce8c5f3f399e8fa39a51393796a22220ea31c3748e48504d069d65b75480d761		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D5F 7852 bytes

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