Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2397d2f64e3a49f…

MALICIOUS

PDF

34.2 KB Created: 2020-04-09 01:09:57 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 229a08479df9acda0c33ceab057337c2 SHA-1: 6bdcf119219b105ac2bb3397da5f71f0bf7697d1 SHA-256: e2397d2f64e3a49ffb7f53a52b1adf849e123a9932bed1d79550ffe392928fd4
96 Risk Score

Malware Insights

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

The PDF document contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The document body text, though partially obfuscated, includes phrases like 'Free download mp3 song photograph ed sheeran', indicating a lure for users to click on these links. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves redirecting users to potentially malicious content hosted on these external domains.

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://rebeccalaplacaattia.com/uploads/1/3/0/8/130873735/130873735.html#free+download+mp3+song+photograph+ed+sheeran
    • http://theindependentsociety.co/uploads/1/3/0/3/130323516/zosej.pdf
    • http://hairbykizzy.com/uploads/1/3/0/3/130323216/nezuboke-nunijud-novep.pdf
    • http://xmaswonderland.com/uploads/1/3/0/6/130639659/5475d.pdf
    • http://miriamterron-elder.com/uploads/1/3/0/6/130605120/vefapomenota-juvif.pdf
    • http://modernpavingsystems.com/uploads/1/3/0/6/130621808/gopaj_rixazememuvulez_zujodute.pdf
    • http://lenscapmedia1.net/uploads/1/3/1/4/131453810/bededimudimejurowo.pdf
    • http://thetaxilady.org/uploads/1/3/0/7/130776123/271708.pdf
    • http://ljzine.com/uploads/1/3/0/7/130775737/kekop.pdf
    • http://marysmarketshop.com/uploads/1/3/0/5/130545097/lijidobizek.pdf
    • http://redefinefn.com/uploads/1/3/0/7/130740440/bomuxixamigeliwobu.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_off00005e92.bin
738f5d260cd6e27656c3f7c796e1593338331918260e3b3f62f676ca69fc6bf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E92 7432 bytes

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