Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cdf6ef26a4db9b6…

MALICIOUS

PDF

35.6 KB Created: 2020-05-22 00:25:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a289238d8de78f6ecd1da1d2056d3b8 SHA-1: 018e06873a18624a3894772feaf59e600b7f3209 SHA-256: 2cdf6ef26a4db9b682f0ca514ea6a608490e3b8182389e17133f98961c24ffe6
94 Risk Score

Malware Insights

MITRE ATT&CK
T1598 External Remote Services T1204 User Execution

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files on different domains. The ML classifier also strongly indicated maliciousness. The document body mentions 'sugar baby sims 4', suggesting a lure to potentially deceptive content. The primary attack pattern involves redirecting users to a link farm, likely for SEO manipulation or to host further malicious payloads.

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://lonemami.com/uploads/1/3/0/5/130588596/130588596.html#sugar+baby+sims+4
    • http://gmxusa.net/uploads/1/3/0/8/130874217/dodusa-toxefujejemi.pdf
    • http://harrisonburgdui.com/uploads/1/3/0/5/130543351/zawugibukedixegusor.pdf
    • http://michelleastentherapy.com/uploads/1/3/1/4/131406473/526403.pdf
    • http://pathwaytosomatichealing.net/uploads/1/3/0/6/130639593/bakosudenuludeluvoxo.pdf
    • http://stockmi.com/uploads/1/3/1/8/131856771/xesizaxiriture.pdf
    • http://nuturefamilyhostcare.com/uploads/1/3/0/3/130323750/zawulusowa.pdf
    • http://jamboreefleetwood.com/uploads/1/3/0/5/130590108/e95d3686.pdf
    • http://thoramsigurdar.com/uploads/1/3/0/7/130776386/vopafojof.pdf
    • http://osxnasozi.com/uploads/1/3/0/6/130639672/f51b879e.pdf
    • http://jackhammondjr.com/uploads/1/3/0/4/130483632/fikagas_lazulobaga.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_off00005e2e.bin
2dba5342945894456481ff711d1dbb0282b93c31f30002c67a447e7dc4c4941b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E2E 10908 bytes

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