Malicious PDF — malware analysis report

Static analysis result for SHA-256 675cff3cb330da78…

MALICIOUS

PDF

36.1 KB Created: 2020-04-05 11:21:34 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 5ce2a1a6d1b23228478f1c49c88965bb SHA-1: e38ec76cadfa29d0e16f985bf07934b6ef876680 SHA-256: 675cff3cb330da7842afce7c936f0892a7f4afbbb6da4e3733c3571559affe98
104 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which point to PDF files hosted on unrelated domains. The document body text, though partially corrupted, includes a lure for downloading a movie, and the PDF_SEO_LINK_FARM heuristic indicates a large number of generated links. This suggests a tactic to distribute malicious content or engage in SEO spam, likely as a lure for further malicious downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://herthaskitchen.net/uploads/1/3/0/2/130287482/130287482.html#the+white+queen+full+movie+free+download
    • http://floatinthesky.com/uploads/1/3/0/5/130551154/0040dfc4a.pdf
    • http://cab-art.eu/uploads/1/3/0/6/130620557/57cf842770.pdf
    • http://primedeal-ksa.com/uploads/1/3/0/2/130288416/wegetov_kixavit.pdf
    • http://werepairshop.com/uploads/1/3/0/4/130435745/0589a4b.pdf
    • http://clarityproblemssolved.com/uploads/1/3/1/4/131411600/wuwarig_jakas_wotonukowu.pdf
    • http://saboresquitutesdaval.com/uploads/1/3/0/5/130550846/97acb1e9345.pdf
    • http://www.paracordyourlifestyle.com/uploads/1/3/0/7/130739341/birasuwawosar.pdf
    • http://libertoskiinsurance.com/uploads/1/3/1/3/131384599/eb6fd2834f95a.pdf
    • http://tinysworld.net/uploads/1/3/0/4/130489398/xosaduguzisu.pdf
    • http://theglutenfreegrainfreegrammy.com/uploads/1/3/0/5/130588376/20ec074ea8447d.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_off00006139.bin
201eedc9f0e628e35b9a67f7cf3b86d73ccaf1e97ff0940f1d4d9bc19f931adc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6139 8508 bytes

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