Malicious PDF — malware analysis report

Static analysis result for SHA-256 0464bfeb46d5c91e…

MALICIOUS

PDF

38.9 KB Created: 2020-04-03 05:32:36 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: fd0f123dec7dc9900893e91d38e160f8 SHA-1: dcb83a4c4e4bac0c787bf19af53c85cd3ff5eb03 SHA-256: 0464bfeb46d5c91e49e5b7f9f4b21f64c71d787734bb9c770931199bd6d3d19d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, indicating a link farm or redirection to potentially malicious content. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves directing users to a multitude of external URLs, likely for SEO manipulation or to serve further malicious payloads.

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://easyfreelegal.com/uploads/1/3/0/5/130538953/130538953.html#im+yours+ukulele+chords+and+lyrics
    • http://mypurpletigerpills.com/uploads/1/3/0/5/130545011/dudafapisexenin.pdf
    • http://tassay-nsk.ru/uploads/1/3/0/3/130323932/nonubuvenu_neluniseporab_vinexugo.pdf
    • http://reekingalpha.com/uploads/1/3/1/0/131071057/papewasa-widolokinuj.pdf
    • http://how-can-we-help.com/uploads/1/3/0/2/130288430/afb71a03c6d8a.pdf
    • http://wildwesttrade.com/uploads/1/3/0/7/130775846/koxetosajin_purure.pdf
    • http://dramagramtv.com/uploads/1/3/0/5/130590613/9887790.pdf
    • http://mondorobot.ca/uploads/1/3/0/5/130545098/xakepivaviga.pdf
    • http://mountainlifemontana.com/uploads/1/3/0/6/130604361/1674909.pdf
    • http://peabsnc.com/uploads/1/3/0/5/130539691/kekijaxajomi-wugaw.pdf
    • http://saitenschlag.net/uploads/1/3/0/8/130814676/4145553.pdf
    • http://cupcakecomeback.com/uploads/1/3/0/2/130291707/ee73d46c2496.pdf
    • http://eldermoonschool.net/uploads/1/3/0/5/130551258/6482664.pdf
    • http://www.morninglightblog.com/uploads/1/3/0/7/130775505/neroduwoxudesip.pdf
    • http://swankypack.net/uploads/1/3/0/4/130476069/105696.pdf
    • http://coldstreamsweetsandtreats.com/uploads/1/3/0/7/130739533/e0ed0952d31f752.pdf
    • http://thedivineu.us/uploads/1/3/0/4/130483299/1365203.pdf
    • http://theresumecafe.com/uploads/1/3/0/7/130739268/e44f8cf629d2c.pdf
    • http://trukradio.com/uploads/1/3/0/7/130776003/8dbef.pdf
    • http://glutenfreestroopwafels.com/uploads/1/3/0/6/130621847/ce0a815b3.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_off0000720b.bin
04d2ae1af3932efb5ffa02700b204c920be2583356edcdbc767a88e1281067d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x720B 7128 bytes

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