Malicious PDF — malware analysis report

Static analysis result for SHA-256 8094bb8686485761…

MALICIOUS

PDF

41.4 KB Created: 2020-04-16 19:50:50 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: db25d5bddd938558ed621591400051bb SHA-1: 04168ee6aae2e0a8f896a34078faea088bc0d0ed SHA-256: 8094bb86864857615c290148a1d50e63fb4ca54778bb8a8ed5592a45d4bb527d
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files on different domains. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but also includes a reference to 'Avr atmega datasheet', which may be a lure. The primary function appears to be acting as a link farm, potentially for SEO manipulation or to distribute further malicious 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://dsflamedesign.com/uploads/1/3/0/2/130272848/130272848.html#avr+atmega+datasheet
    • http://balkanco.com/uploads/1/3/0/8/130813841/vegoxuroso_sunon.pdf
    • http://serenityvalleyhomestead.us/uploads/1/3/0/8/130814754/2b3eeb.pdf
    • http://wjpyouthgroup.org/uploads/1/3/1/3/131398235/43b23f250.pdf
    • http://smallfryz.net/uploads/1/3/1/1/131164537/komewa.pdf
    • http://jordynsjoy.com/uploads/1/3/1/3/131380895/wedowixis.pdf
    • http://sassyarabia.com/uploads/1/3/1/4/131455141/fimukukezorul.pdf
    • http://enterthemoviezone.com/uploads/1/3/0/2/130272472/rifodivipalerig.pdf
    • http://rachelcdoe.com/uploads/1/3/0/7/130775259/9267878.pdf
    • http://playingwithgod.org/uploads/1/3/0/4/130483290/divetorurenixixopa.pdf
    • http://lifestyleplaylist.com/uploads/1/3/0/7/130776503/6537571.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_off00007bff.bin
37d4f17a81b3e14d6a8db73cee7af72d0d4aecee98ed6286fe81f934218f053a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BFF 7668 bytes

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