Malicious PDF — malware analysis report

Static analysis result for SHA-256 56a85318277ea6a9…

MALICIOUS

PDF

61.1 KB Created: 2020-03-25 13:55:32 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 303dcd706c9108ce427b1908b3dcfda1 SHA-1: fa7c0534da35968b3be0eeb7bda043f142e805d9 SHA-256: 56a85318277ea6a9956790d7350ab30755a0f44ecda71cf61047d82108d4105b
94 Risk Score

Malware Insights

MITRE ATT&CK
T1598 External Remote Services

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains text related to 'bright line eating plan reviews' and references the wkhtmltopdf tool, suggesting a lure for search engine optimization or to direct users to potentially malicious websites. The ML classifier strongly flagged this PDF as malicious.

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://sweetestdreams.org/uploads/1/3/0/6/130604126/130604126.html#bright+line+eating+plan+reviews
    • http://vancouverchristians.com/uploads/1/3/0/7/130740207/4561664.pdf
    • http://miracostamun.com/uploads/1/3/0/6/130604798/4946750.pdf
    • http://shopfamilyowned.com/uploads/1/3/0/2/130270987/3916044.pdf
    • http://reportageillustrator.com/uploads/1/3/0/7/130739037/88f5667e2276f.pdf
    • http://www.imchuckchoi.com/uploads/1/3/0/7/130775076/b6bf3a467.pdf
    • http://mylistingexpired.net/uploads/1/3/0/5/130590535/7414417.pdf
    • http://terrysphynxkitten.com/uploads/1/3/0/5/130588924/6b7f63.pdf
    • http://gregberdar.com/uploads/1/3/0/4/130489423/92b9229227.pdf
    • http://tacodelcampus.com/uploads/1/3/0/2/130272488/fosonamin.pdf
    • http://burchettequine.com/uploads/1/3/0/7/130739363/87a9a4.pdf
    • http://oxfordschoolofyoga.com/uploads/1/3/0/7/130775277/e98879a74.pdf
    • http://www.grselectric.com/uploads/1/3/0/6/130639622/5875550.pdf
    • http://koshercorner.org/uploads/1/3/0/6/130621352/5190251.pdf
    • http://asthewoodturnz.net/uploads/1/3/0/8/130873848/jukexirupax.pdf
    • http://mobilizerrs.com/uploads/1/3/0/8/130814783/d631430eade.pdf
    • http://jaronxvisuals.com/uploads/1/3/0/6/130621788/b0fcad.pdf
    • http://wacolunarsociety.com/uploads/1/3/0/7/130739779/watosikixoreme_pimusikigi.pdf
    • http://www.atwatertechnical.com/uploads/1/3/0/5/130546880/da33675e6fefc9.pdf
    • http://newplumtreeheights.com/uploads/1/3/0/5/130539249/3ad6a6a.pdf
    • http://dfasecurity.com/uploads/1/3/0/5/130588708/kusunu.pdf
    • http://pequenascomunidades.org/uploads/1/3/0/6/130639313/wavijupodokudibif.pdf
    • http://buildingblockstherapypllc.com/uploads/1/3/0/6/130620459/9e1aa8ed52b2f.pdf
    • http://glynnpt.com/uploads/1/3/0/3/130379060/zelegoxir_motuxazufof.pdf
    • http://www.allforhosts.com/uploads/1/3/0/7/130775489/dfb9ee.pdf
    • http://brightlineeating.com
    • 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_off0000c4fa.bin
fbb414db29ee71764e8196ed9d9b6dfad5ec373af1f7f8f2cb5e4d679ea334bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4FA 8220 bytes

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