Malicious PDF — malware analysis report

Static analysis result for SHA-256 38597b93a2b7c4eb…

MALICIOUS

PDF

36.6 KB Created: 2020-04-11 04:00:07 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0bc6750aeb94d4f6400fe7239be7db66 SHA-1: 855ea5c356068726b840411b6c572e625cdbe8d6 SHA-256: 38597b93a2b7c4ebcea25f2b8b59a2ad0925096f51f7a179b5cba13b31a6eedb
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links to other PDF files hosted on various domains, a technique often used for SEO poisoning or to distribute further malicious content. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the sheer volume of external links suggests a coordinated effort to direct users to potentially harmful 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://mta-sts.mail.juuriart.com/uploads/1/3/0/5/130541137/130541137.html#a+court+of+mist+and+fury+pdf
    • http://silentxc.com/uploads/1/3/0/5/130588239/dumuz.pdf
    • http://pilates4theworld.com/uploads/1/3/0/2/130272327/tusij.pdf
    • http://bowenworks.ltd/uploads/1/3/0/4/130488197/fudukiv-kagebarivobaf.pdf
    • http://nlpcoursesmelbourne.com/uploads/1/3/0/7/130776065/gapemaxodat-dipigunudokix.pdf
    • http://counselingwithstephanie.com/uploads/1/3/0/5/130540155/be956.pdf
    • http://hubleyshandymanservice.com/uploads/1/3/1/3/131380689/94c0c284e2a9f.pdf
    • http://mindkeyacademy.org/uploads/1/3/1/0/131070483/b31f720a40f07.pdf
    • http://klarma-jobopportunity.com/uploads/1/3/0/5/130543070/wasir_lamumaponiti_dabepo.pdf
    • http://cheryltesslersolitfoundation.com/uploads/1/3/0/9/130969372/8d858565c0e53cd.pdf
    • http://donovenlawpllc.com/uploads/1/3/1/3/131379730/nipuduzeve_fudowowas.pdf
    • http://premiersportsms.com/uploads/1/3/0/5/130590677/xopiwup.pdf
    • http://lisakleinspeech.com/uploads/1/3/1/3/131381374/zakebiwipozi-wifakone-lupixek-sebinofatu.pdf
    • http://isanadventure.com/uploads/1/3/1/0/131070071/zejewemawowo-tagetesugivixi-felidoxasonoso.pdf
    • http://klarma-jobopportunity.com/uploads/1/3/0/5/130543070/wasir_lamumaponiti_d
    • 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_off0000656f.bin
2c786fab493b0f1ae69f59a63e1a06c57ec7d83c98d88e7078137a08d7914eea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x656F 8560 bytes

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