Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5e2e002d9c1bf62…

MALICIOUS

PDF

40.4 KB Created: 2020-04-10 02:18:37 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 267e81077bdf677b268de3aa269677b7 SHA-1: db1a0b7b2ef6ddb5d3ad7351abfe903973ffaa9f SHA-256: a5e2e002d9c1bf62d08d90e00704efdcd8a0e40889e05aa78ce5e35f28355865
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDF files hosted on various domains, indicative of a link farm or SEO abuse. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves directing users to a network of potentially malicious or deceptive PDF documents.

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://datanetguatemala.com/uploads/1/3/1/3/131380609/131380609.html#flask+set+cookie
    • http://agencebreizstore.com/uploads/1/3/0/5/130540280/74fd192b2.pdf
    • http://wordsbyashley.com/uploads/1/3/0/8/130813518/8146402.pdf
    • http://unlockingthemysteriesofancientegypt.com/uploads/1/3/1/4/131414134/8bb27.pdf
    • http://vegassellsvegas.com/uploads/1/3/0/8/130814993/wibugaguj.pdf
    • http://dustfreehome.nl/uploads/1/3/1/0/131070227/pojosetotifivu.pdf
    • http://kastleinspections.com/uploads/1/3/0/6/130620337/b296e.pdf
    • http://miraclevalleyceylon.com/uploads/1/3/0/5/130542770/6627996.pdf
    • http://seagroveswormsmore.com/uploads/1/3/0/7/130775587/tamosapu.pdf
    • http://hangarfitness.com/uploads/1/3/1/4/131454733/9574710.pdf
    • http://synodalcatholics.org/uploads/1/3/1/4/131436972/7270570.pdf
    • http://prettydelicate.com/uploads/1/3/1/4/131438193/1995899.pdf
    • http://larissacidlinsky.com/uploads/1/3/1/0/131070325/9930620.pdf
    • http://bougeebox.com/uploads/1/3/1/1/131164417/5020765.pdf
    • http://adapthealgrow.org/uploads/1/3/0/6/130640178/5728933.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_off00007459.bin
204ce7466d1ec8649ebf014cf7505c18b45a115209addf223099e931b71c4ef9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7459 8292 bytes

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