Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff03979fcb1894c9…

MALICIOUS

PDF

41.2 KB Created: 2020-06-02 08:44:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f106a7f14fdc01963f7e6315bebce5f7 SHA-1: 27290974a63b50f3fb657b8c9cfbe48fa98b4d06 SHA-256: ff03979fcb1894c903b4d1774638dc51485f10a9d27cabbe7cf44edd54f8c789
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The document body, though heavily obfuscated, contains references to game downloads and application names, suggesting a lure. The primary function appears to be directing users to a vast network of external PDF files hosted on various domains, likely for SEO spam or to distribute further malicious content.

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://sarahelizart.com/uploads/1/3/0/8/130874026/130874026.html#gta+vice+city+ggmm+indir
    • http://lalandscaping.org/uploads/1/3/0/2/130288379/6398e2df6412a3.pdf
    • http://biohaircarethailand.com/uploads/1/3/0/6/130639679/bd45331.pdf
    • http://holmeslovestravel.com/uploads/1/3/0/7/130740080/dagedonaju.pdf
    • http://businessreviews.xyz/uploads/1/3/1/3/131381450/4bdce.pdf
    • http://pennacookpregnancy.com/uploads/1/3/0/7/130739188/b76ecb8f7.pdf
    • http://ignitionpointtraining.net/uploads/1/3/0/9/130969740/vewubejoxatakolemi.pdf
    • http://jewelrybybarb.com/uploads/1/3/0/7/130738779/mijuraleda-nuzuwa-zuwebizan-lemezoxamub.pdf
    • http://sunsethospitality.org/uploads/1/3/0/7/130775470/lufajage-gopidural.pdf
    • http://carseatkids.com/uploads/1/3/0/6/130603709/f9c5a5230c.pdf
    • http://sarahelizart.com/uploads/1/3/0/8/130874026/terms.html
    • http://sarahelizart.com/uploads/1/3/0/8/130874026/dmca.html
    • http://sarahelizart.com/uploads/1/3/0/8/130874026/policy.html
    • https://pekesobudu.files.wordpress.com/2020/05/gejezebuzopujij.pdf
    • https://jejasefepu.files.wordpress.com/2020/06/fatomabalegapuputawitez.pdf
    • https://zopowozofoje.files.wordpress.com/2020/05/letuloti.pdf
    • https://nowizajigoga.files.wordpress.com/2020/05/60178550806.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_off000074cb.bin
fc0cf1fae4047f0c8661182b9a91bcf08996ce1a6d3abdb1d0bb2fc988809066		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74CB 10680 bytes

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