Malicious PDF — malware analysis report

Static analysis result for SHA-256 047db5fd0fcd9a89…

MALICIOUS

PDF

38.6 KB Created: 2020-04-23 08:00:28 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c85ebfd82a6cb682d04e11f8605ecb65 SHA-1: b7d3cac7d6345f5614962e4d2292ce30898d803e SHA-256: 047db5fd0fcd9a898683f9f8fb713e7de6852f60b90748a8a242658e699e6355
96 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The primary URL http://photoneff.com/uploads/1/3/0/7/130775440/130775440.html#bomberman+story+gba is likely part of a link farm designed to manipulate search engine results or redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

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://photoneff.com/uploads/1/3/0/7/130775440/130775440.html#bomberman+story+gba
    • http://laoise.net/uploads/1/3/1/4/131483108/70d2480240.pdf
    • http://votelarocca.com/uploads/1/3/0/2/130271153/lijafafikowajofun.pdf
    • http://myperfectlife.net/uploads/1/3/1/0/131070062/3467975.pdf
    • http://wyestoreonline.uk/uploads/1/3/0/5/130551597/pifot_libukuto.pdf
    • http://emotibox.org/uploads/1/3/0/9/130969748/gowawa.pdf
    • http://vinthreads.com/uploads/1/3/0/6/130639491/492151.pdf
    • http://mashamgallery.com/uploads/1/3/0/7/130739557/telurobe-robuzewolidurij.pdf
    • http://bonairminiatureschnauzers.com/uploads/1/3/1/4/131438268/gisaxi-folajix-jodom.pdf
    • http://makelemonade.net/uploads/1/3/0/5/130589348/2748194.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/
    • http://www.adobe.com/).Noto
    • http://www.google.com/get/noto/http://www.adobe.com/type/This
    • http://scripts.sil.org/OFLNoto

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f07.bin
744f15a6080cdd68a0a44d8c6e060aa4466007159bc1cebb489cd31915cb01c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F07 7776 bytes
font_01_sfnt_off00007d05.bin
4102ce32db0e00ebf52374f9ae24c727001702573044555d8e149070268c125e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D05 5440 bytes

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