Malicious PDF — malware analysis report

Static analysis result for SHA-256 69fdde35c0acc04b…

MALICIOUS

PDF

83.3 KB Created: 2020-03-07 10:41:13 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e60b731235140060d38454ac807b460e SHA-1: 2d299f8af2cdb3985962e049fe4ac63693044b7a SHA-256: 69fdde35c0acc04bead056770fefde4c27e0c13a7981f0fc51298599eb9d8fd4
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of embedded links, many of which point to other PDF files on various domains, suggesting a link farm or redirection scheme. The document body, though partially corrupted, indicates a lure related to a "Pan card change form editable". The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external URIs supports a malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and heuristics point to a malicious PDF designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://web4.pleasingfood.com/uploads/1/3/0/4/130476200/130476200.html#pan+card+change+form+editable
    • http://projetoedificar.com/uploads/1/3/0/8/130874477/4294067.pdf
    • http://eccoracing.com/uploads/1/3/0/5/130539205/nupevudowi.pdf
    • http://acpstudios.com/uploads/1/3/0/7/130776504/lutugufuget-wepen.pdf
    • http://rayrobbinsagency.com/uploads/1/3/0/5/130543816/babepufapixajowo.pdf
    • http://mail.hwy21rvparkandstorage.com/uploads/1/3/0/7/130776221/kufaxuguli_fafiv.pdf
    • http://zapddocs.com/uploads/1/3/0/6/130639885/7795871.pdf
    • http://myangeliques.com/uploads/1/3/0/4/130488217/2798656.pdf
    • http://teamthomason.net/uploads/1/3/0/3/130323733/boxuxovupevow.pdf
    • http://heybereaufuels.com/uploads/1/3/0/8/130874285/2245744.pdf
    • http://bettermemphistogether.com/uploads/1/3/0/2/130272318/sitido-gaxow.pdf
    • http://acsfcampussports.com/uploads/1/3/0/7/130739069/tosar.pdf
    • http://blvd420.com/uploads/1/3/0/3/130313363/20b60c.pdf
    • http://littlehedgefund.com/uploads/1/3/0/2/130270892/b03e2587c2c2b.pdf
    • http://www.type23.net/uploads/1/3/0/2/130271185/3812078.pdf
    • http://www.letsdiscovertogether.org/uploads/1/3/0/9/130969483/3561962.pdf
    • http://elevagesdhermes.net/uploads/1/3/0/2/130291589/0a9397e84e7ca75.pdf
    • http://cybertronsolutions.com/uploads/1/3/0/2/130272360/52c1d76dd7ef.pdf
    • http://littlehimsandhers.com/uploads/1/3/0/5/130543262/jageloromom-mitubumap-lewogajobakasar.pdf
    • http://million-arts.com/uploads/1/3/0/2/130272648/vewokasoderikobuxi.pdf
    • http://aenahotels.com/uploads/1/3/0/4/130477234/34b64.pdf
    • http://okiedesign.net/uploads/1/3/0/6/130639661/totoduwudizun-zameno-sumibajezales.pdf
    • http://livslee.com.au/uploads/1/3/0/7/130775750/2220043.pdf
    • http://www.471633614246918175.com/uploads/1/3/0/7/130775242/nuwuwaw.pdf
    • http://bartoncourtstudios.co.uk/uploads/1/3/0/7/130776617/bb55b.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/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce04.bin
a981f42b1431231e39e2fcc63a56c9789fbf2c5391b087426b06636ef305c405		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE04 8908 bytes
font_01_sfnt_off0000f00a.bin
ca889182d22413b1a5b6446cd5d954c095bfc2c8b2fec1022b19199100617195		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF00A 16028 bytes
font_02_sfnt_off00010458.bin
de056c288bc62e23befa7188f4f2b47b8febc6d978f362fb77e95956f455dc1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10458 20332 bytes

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