Malicious PDF — malware analysis report

Static analysis result for SHA-256 49d63f619379fe09…

MALICIOUS

PDF

56.1 KB Created: 2020-05-15 07:28:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 129790efaf597e80f456004f55928df4 SHA-1: c6d6ae2a6bbe35ffbd1d96641c2c91bd3cb810d4 SHA-256: 49d63f619379fe097cfed4f81ff4344c8ce24e83fc91a36986b882ede726abd2
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, indicating it functions as a link farm for SEO manipulation. The ML classifier strongly flagged this PDF as malicious. The embedded URLs are designed to redirect users to various external sites, likely for malicious purposes such as phishing or malware distribution.

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://leeoptical-malden.net/uploads/1/3/1/3/131380521/131380521.html#android+tv+box+4gb+ram
    • http://allstatebusinessca.com/uploads/1/3/1/0/131070567/dorekajowol_sekusupipal_jumofafozizimel.pdf
    • http://polyglothelp.com/uploads/1/3/0/6/130620778/dajefinisevepe-gosav-nutitebedofasu.pdf
    • http://saveoursuburbs.org/uploads/1/3/0/6/130621072/1686653.pdf
    • http://villageoaksofroundrock.com/uploads/1/3/1/6/131606047/72a9c732f50e2.pdf
    • http://venture-smith.org/uploads/1/3/1/4/131438316/vijadabamopuv-fojep-wegezitenob-xadipuwumurusaw.pdf
    • http://wallentingroup.com/uploads/1/3/0/4/130435635/moruvarijorupub-puzuxivo.pdf
    • http://psiquilibre-pilatestudio.net/uploads/1/3/1/0/131070972/dasawigoromet-voderizazufu-demun-vavaded.pdf
    • http://angelsempire93.com/uploads/1/3/1/4/131437765/suwidopenetati.pdf
    • http://1300998887.com/uploads/1/3/0/7/130739535/0ebd3598e70.pdf
    • http://waitakaruruschool.com/uploads/1/3/0/2/130288559/loralovixiwu_felezivokevopa_kokakufovemi_fugotojadazikas.pdf
    • http://unb10.com/uploads/1/3/0/9/130969032/3f7b196e798c94.pdf
    • http://wellnessclub.blog/uploads/1/3/0/6/130603815/jodivosinikabe.pdf
    • http://mrrick.net/uploads/1/3/1/1/131164248/7622201.pdf
    • http://deansagandheavyequipment.com/uploads/1/3/0/3/130313127/fodisijasivedel.pdf
    • http://lamontagnesecurite.com/uploads/1/3/0/6/130620407/miketakira-talinilupiko.pdf
    • http://centrodepaz.net/uploads/1/3/0/3/130323465/c8cc769552.pdf
    • http://victoriacuradigitalportfolio.com/uploads/1/3/1/8/131872286/zulepasepimu.pdf
    • http://personalcareeducation.com/uploads/1/3/0/8/130873958/dalotab-zizezilefi.pdf
    • http://henric.xyz/uploads/1/3/1/4/131483557/xeluzonajuwunu.pdf
    • http://yourhomebar.com/uploads/1/3/0/5/130590374/7929532.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a3d5.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
pdf-font-stream PDF embedded font (sfnt) at offset 0xA3D5 1800 bytes
font_01_sfnt_off0000ac61.bin
7d74a9f8ca504bb740d5e60652a3b6aa4a2dfb553af646d1d9fd95d27b134b18
pdf-font-stream PDF embedded font (sfnt) at offset 0xAC61 11648 bytes