Malicious PDF — malware analysis report

Static analysis result for SHA-256 b11a36178bb374cd…

MALICIOUS

PDF

73.8 KB Created: 2020-04-07 06:58:38 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ec7ae831a3d735878cb066f04aab4cf4 SHA-1: 921015ddce558fc8a7835a00e3916a501c557872 SHA-256: b11a36178bb374cdf720c6ed91d34f0e4d1d19d95d94d6693e71bd7e3abd10ff
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, many of which point to other PDF files on similar domains. This pattern is indicative of a link farm designed to distribute malicious content. The primary URL found in the document body, http://corralero.org/uploads/1/3/0/9/130969865/130969865.html#sony+psx+bios+scph1001.bin, suggests a lure related to a specific file, likely to entice users to click through to malicious sites.

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://corralero.org/uploads/1/3/0/9/130969865/130969865.html#sony+psx+bios+scph1001.bin
    • http://eversafebracelet.com/uploads/1/3/0/7/130738501/2291418.pdf
    • http://lajanette.com/uploads/1/3/0/2/130289485/befatasuwomugev.pdf
    • http://sistersqueenofmercy.org/uploads/1/3/0/6/130621093/vebazu.pdf
    • http://oproservices.com/uploads/1/3/0/6/130621684/musumenirog-gufekisenifop.pdf
    • http://girlwonder.net/uploads/1/3/0/5/130551351/sovevixobaru.pdf
    • http://evelynhsullivanmediation.com/uploads/1/3/0/5/130550846/jilunitun.pdf
    • http://tellmesomethinggood.net/uploads/1/3/0/8/130873912/xurazemorupu_fusifenin_pujovusobibopal_lovajeki.pdf
    • http://nypdvolleyball.com/uploads/1/3/1/4/131406698/1688729.pdf
    • http://arthurchenmusic.com/uploads/1/3/0/6/130639258/594ae9b3e9e3.pdf
    • http://bapsculptor.com/uploads/1/3/0/7/130738998/aad6d58a6bf8e05.pdf
    • http://fidgetspinrehab.com/uploads/1/3/0/6/130603928/4f0d86d33d70.pdf
    • http://cs25983456.com/uploads/1/3/0/2/130270748/b3b35ad7ac184.pdf
    • http://shaohuawu.com/uploads/1/3/1/4/131438356/2661563.pdf
    • http://buydayofthedead.com/uploads/1/3/0/6/130603983/1547388.pdf
    • http://gloskinboutiqueny.net/uploads/1/3/1/1/131163841/rowopilibofuze.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_off0000f92a.bin
be7f4778b97aca093f0a01e1e0aeff9ae9d734f1a5e05024e7cbc1c09c979457		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF92A 8592 bytes

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