Malicious PDF — malware analysis report

Static analysis result for SHA-256 1780dc664923e11a…

MALICIOUS

PDF

42.2 KB Created: 2020-03-23 12:27:29 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 5b65be25cb938cea5e33803f8bf6b101 SHA-1: 819c612375a2f5254b53c2a788da7d73efe4356f SHA-256: 1780dc664923e11a91f4c2862f108d770d032c00ae5e85d3d56618fa8f72d373
96 Risk Score

Malware Insights

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

This PDF file was identified as malicious by an ML classifier and contains a large number of external links, suggesting a link farm or SEO manipulation tactic. The document body, though partially corrupted, contains references to 'best chess books for beginners pdf' and embedded URLs, indicating a lure to external content. The presence of numerous external PDF links points towards a strategy to distribute or link to 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://shinkojiki.org/uploads/1/3/0/8/130874316/130874316.html#best+chess+books+for+beginners+pdf
    • http://mistykwilliams.com/uploads/1/3/0/6/130640019/niduzaza_jitili.pdf
    • http://www.ecuriebarnton.com/uploads/1/3/0/7/130739214/569855.pdf
    • http://gsblackburndesign.com/uploads/1/3/0/3/130313346/pikiteboneko-forusil.pdf
    • http://motorcityracing.shop/uploads/1/3/0/4/130476574/8071607.pdf
    • http://thebambooretreat.com/uploads/1/3/0/7/130739297/8971548.pdf
    • http://withlovehelly.com/uploads/1/3/0/5/130551309/3d8204e0b.pdf
    • http://reeeeeeeee.com/uploads/1/3/0/2/130289809/de4021f842b8b68.pdf
    • http://simplyessentiallife.com/uploads/1/3/0/6/130621603/matonewuvi_pikexune_lobatotup_nizix.pdf
    • http://johnnymorney.com/uploads/1/3/0/2/130272284/51775.pdf
    • http://www.brexitpartychichester.co.uk/uploads/1/3/0/5/130550885/tuzupuvafati.pdf
    • http://crowandbetty.com/uploads/1/3/0/7/130739731/palepofubow.pdf
    • http://mail.hogansmusic.com/uploads/1/3/0/6/130621947/b7c7c7ac95e6.pdf
    • http://lucassincasa.com/uploads/1/3/0/3/130323968/befopikupisiwigixi.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_off00007c5b.bin
5db38f862a90ec8a1c0e01e8f0229b418273cd2c731d24f94f506f7b68edbaf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C5B 8308 bytes

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