Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d407710ff557b76…

MALICIOUS

PDF

38.2 KB Created: 2020-04-21 17:49:04 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 30185ab1aa1dc1be584f521b593e0ccf SHA-1: 3046e983786ee85d6264bf07200d71882cfdf561 SHA-256: 4d407710ff557b76a04903a1b1f75a9a4c6f11b0bf431525d4e61d872508d6d6
94 Risk Score

Malware Insights

MITRE ATT&CK
T1598 Gather Victim Identity Information T1204 Malicious Link

The PDF file was identified as malicious by an ML classifier with high confidence. It contains a large number of external links, many of which point to PDF files with numeric slugs, suggesting a link farm or SEO abuse tactic. The document body, though partially corrupted, indicates it is presented as educational material ('Worksheets on gerunds participles and infinitives'). The primary attack pattern appears to be the distribution of numerous external links, likely to host malicious content or manipulate search engine results.

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://ewaveinc.com/uploads/1/3/0/2/130272462/130272462.html#worksheets+on+gerunds+participles+and+infinitives
    • http://katysullivanartistry.com/uploads/1/3/1/6/131637755/1314909.pdf
    • http://celebrateloveliceremony.com/uploads/1/3/0/9/130969529/nanepibiwep.pdf
    • http://supportserbia.com/uploads/1/3/0/6/130621485/rotikerow.pdf
    • http://shomesky.com/uploads/1/3/1/4/131452858/dutudanaf.pdf
    • http://10dayscreditboost.com/uploads/1/3/0/5/130590229/fubuxedovubulis.pdf
    • http://maebee.net/uploads/1/3/0/5/130588337/parejutefe.pdf
    • http://oc1toolteam.com/uploads/1/3/0/5/130540583/fokinefirigamewo.pdf
    • http://drawndialogues.com/uploads/1/3/0/5/130550911/jixowep.pdf
    • http://sturmspainting.com/uploads/1/3/1/4/131437649/zokuzebugapexo_kadaralim.pdf
    • http://moonandmountaindesigns.com/uploads/1/3/1/4/131412290/soxiluti_nabunogofugo_fosulu_xerik.pdf
    • http://sanctuaryct.org/uploads/1/3/1/6/131606162/gejix-xamokap-momavefebavusu.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_off00006bfa.bin
1e4943f959065c685fb4dd971f1e6d54db04f8dceb5716e30c5f57e9a981ccf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BFA 7928 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.