Malicious PDF — malware analysis report

Static analysis result for SHA-256 23e20db384a3d57a…

MALICIOUS

PDF

41.1 KB Created: 2020-03-25 02:05:32 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 18536e9fcc552f035d62a6fe8ea26dbb SHA-1: 1de6da07e6869574dfd5958a6b76414e3b79620c SHA-256: 23e20db384a3d57a349e701ece57c87d92561175328b24d4a98f1ad812c82b7e
94 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, embedding a large number of external URLs. The ML classifier strongly indicates maliciousness, and the presence of numerous links suggests an attempt to direct users to potentially harmful external content. No scripts were extracted, but the PDF structure itself is indicative of a phishing or redirection attempt.

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://kenraye.net/uploads/1/3/0/7/130775537/130775537.html#stranger+things+eleven+punk+outfit
    • http://phapapp.com/uploads/1/3/0/5/130538866/wexuz_vakizemilidig_laloforom_jatalozepuvuni.pdf
    • http://called2mission.com/uploads/1/3/0/6/130639173/lefutirosugejotonis.pdf
    • http://bellafurworks.com/uploads/1/3/0/7/130740048/diwikosijim-zofavutilesab.pdf
    • http://stanzley.com/uploads/1/3/0/3/130323141/pebor.pdf
    • http://www.pinemountainlakelodge.com/uploads/1/3/0/3/130323384/sebifesilepu_dupepofu.pdf
    • http://yourvirtualbestfriend.com/uploads/1/3/0/2/130289481/fc046a773e3d.pdf
    • http://echolandapartments.com/uploads/1/3/0/7/130775674/butumiwijokagos.pdf
    • http://valestingrayscience.com/uploads/1/3/0/9/130969926/9903224.pdf
    • http://sarahspencestylist.com/uploads/1/3/0/2/130287842/2263411.pdf
    • http://salespointmarketing.com/uploads/1/3/0/4/130476481/butezetu.pdf
    • http://www.magicalspincasino.org/uploads/1/3/0/4/130476273/9282328.pdf
    • http://cnjpooran.com/uploads/1/3/0/2/130274076/832629.pdf
    • http://mta-sts.turncoat-media.com/uploads/1/3/0/8/130814065/rabaz-namovora-duvekafudeko-lixugerider.pdf
    • http://kovehomes.com/uploads/1/3/0/5/130589274/41e9fdc35588.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_off0000760d.bin
11c46da5b6e16dcd0ae7a5e2cd7684c8447c15f09a382ebcfc58326661fdf393		 pdf-font-stream PDF embedded font (sfnt) at offset 0x760D 8180 bytes

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