Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e58a411363bc1ef…

MALICIOUS

PDF

43.7 KB Created: 2020-03-25 14:56:18 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1503d75063c70bccd405c4b1f3f8854b SHA-1: 51a905f9cd0976b1e06e12e83a880fb8e68e393f SHA-256: 6e58a411363bc1ef2ff4fb8a00714227f3b65253b0fac8e089ca694228282b19
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are also present in the list of extracted links. This suggests the document's primary purpose is to redirect users to a network of linked content, potentially for SEO spam or to host further malicious payloads.

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://lovelightlifecoaching.com/uploads/1/3/0/6/130620848/130620848.html#ni3+lewis+structure+polar+or+nonpolar
    • http://www.newhavenmo.com/uploads/1/3/0/6/130604042/lokid_bunaboxive.pdf
    • http://iboatsmart.com/uploads/1/3/0/3/130323620/lajizojisu.pdf
    • http://www.abbyandda.com/uploads/1/3/0/6/130639835/4479233.pdf
    • http://bimaservices.net/uploads/1/3/0/4/130476208/4594212.pdf
    • http://www.riotechelevadores.com/uploads/1/3/0/7/130775698/nawewitoxolixi_womob_situbulidisoxa.pdf
    • http://www.camillekireilis.com/uploads/1/3/0/5/130590229/5280651.pdf
    • http://stockwits.com/uploads/1/3/0/5/130589090/disetanajowu.pdf
    • http://www.daisyscleaningservice.com/uploads/1/3/0/4/130483239/natulobevagikudisura.pdf
    • http://computertutorialsonline.com/uploads/1/3/0/9/130969957/xogipowinomuj-laxavonokuxidep.pdf
    • http://zombieland.studio/uploads/1/3/0/3/130379141/fabeka.pdf
    • http://legendofthebull.com/uploads/1/3/0/4/130435666/sopuweworovusuji.pdf
    • http://alejandrodu.com/uploads/1/3/0/7/130776304/kirexav_werunotim_jopuvabed_tigapijewu.pdf
    • http://socceravenue.net/uploads/1/3/0/8/130813750/3964569.pdf
    • http://jedawellnest.com/uploads/1/3/0/3/130323103/8649462.pdf
    • http://bellabyb.com/uploads/1/3/0/5/130590503/5449905.pdf
    • http://kadensblog.online/uploads/1/3/0/6/130639463/41202.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_off00008234.bin
77d202afa5ec5248ad768d6ed68897c21face2e22b4006d007967393da625e40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8234 8128 bytes

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