Malicious PDF — malware analysis report

Static analysis result for SHA-256 03cae48c1332b64e…

MALICIOUS

PDF

41.9 KB Created: 2020-03-29 06:38:09 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1b3e910e1b755a4117aec805c75e6de5 SHA-1: dd6e25d0c2f91a9f54a329783a694a7a408f55f8 SHA-256: 03cae48c1332b64e9e813bc4de875182f9afdbe44a7de33a6963f17a68a1d4b0
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The primary URL found is http://benkregel.com/uploads/1/3/1/3/131383650/131383650.html#books+like+v+is+for+virgin, which points to a page that appears to be part of a link farm. This suggests the document is likely used for SEO manipulation or to redirect users to potentially malicious content hosted on numerous domains.

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://benkregel.com/uploads/1/3/1/3/131383650/131383650.html#books+like+v+is+for+virgin
    • http://meganwanlassart.com/uploads/1/3/0/6/130605498/78e6bfa0.pdf
    • http://mbwvoice.com/uploads/1/3/0/6/130639498/wozevawovejo-zovifazozoda.pdf
    • http://hackingcloud.com/uploads/1/3/0/6/130620972/1648389.pdf
    • http://tecovasfoundation.com/uploads/1/3/0/7/130775556/fakobo.pdf
    • http://gemmytun.store/uploads/1/3/0/6/130605149/fukozolesawitis.pdf
    • http://carolinaspconstruction.com/uploads/1/3/0/5/130542953/9722193.pdf
    • http://katieskandies.com/uploads/1/3/0/7/130738950/2318689.pdf
    • http://hostmaster.deutsches-haus-sonthofen.de/uploads/1/3/0/4/130435637/durukoganuganifawu.pdf
    • http://www.drupal.basaltlibrary.org/uploads/1/3/0/2/130289478/sotinegotelokuzuli.pdf
    • http://nataliebrandtsaccess.com/uploads/1/3/0/2/130292014/penadife.pdf
    • http://daycare-playgroundequipment.com/uploads/1/3/0/3/130323555/japove.pdf
    • http://scenicviewsigns.net/uploads/1/3/1/0/131070527/51b10d16d4f84.pdf
    • http://arrowheadacupuncture.com/uploads/1/3/0/6/130604027/43f117d0.pdf
    • http://gogeneralalarmco.com/uploads/1/3/0/5/130589220/buluju.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_off000079e4.bin
01ddf036c73d57ec84ceb189702e1ce2f07372a7768122024e33721ed8991209		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79E4 8080 bytes

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