Malicious PDF — malware analysis report

Static analysis result for SHA-256 78cced1ad18eac6f…

MALICIOUS

PDF

42.9 KB Created: 2020-03-30 09:09:48 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 36bd7bf6ea9bbb1345c8958b4c51eafb SHA-1: 2e3c6c12f174c37bff0e5808dea14ba284bdd412 SHA-256: 78cced1ad18eac6f6d9f81e0cd7e6df4ddac3a3d570fd32b963fe167e54c6848
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, a common technique for SEO poisoning or distributing malicious content. The heuristic PDF_SEO_LINK_FARM specifically identified this behavior, indicating a link farm designed to manipulate search engine results or redirect users to malicious sites. While no scripts were directly extracted, the presence of numerous URLs suggests a potential for downloading further payloads or phishing attempts.

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://74-123-79-26.mgwnet.com/uploads/1/3/0/5/130550723/130550723.html#sap+hana+enterprise+cloud+certified+partners
    • http://theminimalistnutritionist.com/uploads/1/3/1/3/131398214/4141302.pdf
    • http://jenlynns.com/uploads/1/3/0/8/130874516/tovapojetofoxuf-tubutexu-nujogoxuwaj-famejofumemo.pdf
    • http://pilarenergy.com/uploads/1/3/0/5/130539053/wimasusutikozo.pdf
    • http://bignightconsulting.com/uploads/1/3/0/8/130874015/1120710.pdf
    • http://ferenbach.com/uploads/1/3/0/8/130873841/sedisa.pdf
    • http://briorecordings.net/uploads/1/3/0/6/130620224/gozatopujukojutika.pdf
    • http://eyemagine.media/uploads/1/3/0/6/130639787/sonusefale.pdf
    • http://wolfeatthedoorpuppets.com/uploads/1/3/1/0/131071258/becf865.pdf
    • http://numinersfootball.com/uploads/1/3/1/4/131437119/8e6d74b.pdf
    • http://artbookblog.org/uploads/1/3/0/9/130969916/mogedosunobajan_fegedide.pdf
    • http://wirelessearphones.org/uploads/1/3/0/3/130323466/73ea50dbf32f.pdf
    • http://mail.c3power.org/uploads/1/3/0/2/130272350/9397243.pdf
    • http://drfrancineweston.com/uploads/1/3/0/6/130639098/jobikuba.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_off00007dd0.bin
0c8613d0e7e8171829d5d190cabaf3b1d22cd0f005205de196b1a017dc9f275e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DD0 8488 bytes

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