Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bcd74b154a1d375…

MALICIOUS

PDF

31.9 KB Created: 2020-03-30 11:11:07 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 3b473d4f5ed39d0742e3b1acb7384894 SHA-1: 512d36a6ccc48800a05ecc8fd5bc123b358ee265 SHA-256: 7bcd74b154a1d375418ddf2e5f6d532793329a8e0496709f18b7de1f7f16e6f5
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier also strongly indicated maliciousness. These links likely serve to redirect users to malicious websites or to manipulate search engine results, potentially for SEO spam or to distribute further malware. The document body itself is heavily obfuscated and contains embedded URLs.

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://bartolomeilaw.com/uploads/1/3/0/3/130313539/130313539.html#buenas+practicas+de+higiene+bph+pdf
    • http://annmajercik.com/uploads/1/3/1/3/131383377/zabasoveva.pdf
    • http://boltclan.org/uploads/1/3/0/7/130738759/f16e900284370.pdf
    • http://sterlingheights.christmas/uploads/1/3/0/5/130541688/zajeriwolezi.pdf
    • http://sarahrdavidson.com/uploads/1/3/0/8/130874295/podoro-belajavuwaz-bavuvejupawex.pdf
    • http://prepaidhomedeductible.com/uploads/1/3/0/7/130775341/f1f4cb3a01a2fd6.pdf
    • http://rejuvatouch.com/uploads/1/3/0/6/130621665/9903920.pdf
    • http://sueporemba.net/uploads/1/3/0/6/130604606/6480715.pdf
    • http://atkinknowlesakar.com/uploads/1/3/0/6/130604467/jokixegigof_pufozonopov.pdf
    • http://bernardobellostudio.com/uploads/1/3/0/4/130435697/d508d175ea.pdf
    • http://deft-touch.com/uploads/1/3/0/5/130588676/segigofekid-kudipik.pdf
    • http://abrownstaylor.com/uploads/1/3/1/1/131164524/kavozopokal-gokokud.pdf
    • http://www.lyp88.net/uploads/1/3/1/3/131380531/ed8400ee.pdf
    • http://autodiscover.oversightconsult.com/uploads/1/3/0/3/130379294/zuvasufopadix.pdf
    • http://indprop.com/uploads/1/3/0/3/130313391/b9226198.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_off00005649.bin
fb92ad2ac9f21cf4076c214610b1224980b610e1455315eae8e1464df0e2d3fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5649 7164 bytes

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