Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b8f22744d8f4d58…

MALICIOUS

PDF

32.5 KB Created: 2020-05-13 14:53:02 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f3039bbef6ed7c303946891076a9f565 SHA-1: 3bd3611069efcaf9d23e58b8e161215d9056b34a SHA-256: 0b8f22744d8f4d58b0f9728ca7be6b22741af23c79273b25234641a9ec6c8821
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, identified as a PDF link farm. The ML classifier strongly indicated maliciousness. The primary purpose appears to be SEO manipulation or directing users to potentially malicious content hosted on numerous domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://insightin2music.com/uploads/1/3/0/8/130874400/130874400.html#artful+dodger+movin+too+fast
    • http://stucolovphotography.com/uploads/1/3/1/4/131437932/4869090.pdf
    • http://federicoroncarolo.com/uploads/1/3/1/8/131871674/tubalixozo-rivuvilonuz.pdf
    • http://how2teachreading.com/uploads/1/3/0/5/130543665/4435285.pdf
    • http://lifeofkae.com/uploads/1/3/0/6/130622093/5623716.pdf
    • http://risingartistfestival.com/uploads/1/3/0/6/130639741/d72e17.pdf
    • http://youngbros.info/uploads/1/3/0/3/130379743/lolijawokaludum.pdf
    • http://renewpsychiatry.com/uploads/1/3/0/5/130539697/9263802bb1b8.pdf
    • http://rolfeimages.us/uploads/1/3/0/5/130543351/xerikirudese.pdf
    • http://carrielifeinsurance.com/uploads/1/3/0/3/130313049/2ac8a6.pdf
    • http://yourpriorityzone.company/uploads/1/3/0/3/130379474/temadiduxuxukib-nimipupem-wasuxubux-vovaxexugawa.pdf
    • http://kochhospitality.com/uploads/1/3/1/0/131071073/kesazavofuvutaxata.pdf
    • http://talluriphotography.com/uploads/1/3/0/6/130604765/kebaza.pdf
    • http://elitetechnologygroup.org/uploads/1/3/1/4/131453485/desibodolojalow-lakemugejuvog-wefubo-xovuvej.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000539e.bin
63f42ab086dd3d79b242b7ba19afc7db2857dcf1049e86c946f7224931a08a79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x539E 10344 bytes

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