Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9f03902699b2dd4…

MALICIOUS

PDF

72.2 KB Created: 2021-02-18 08:40:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a1df9edb6723424850baddf8c5bd9b2 SHA-1: 13eec6574ce03a5efa504a8f1aa37755c52e848b SHA-256: f9f03902699b2dd4f8fbe827002cc8b638b13ca22fec2722af46b2ad19822b4f
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The primary URL, 'https://jottigo.ru/123?utm_term=2004+honda+odyssey+rear+tire+size', suggests a potential SEO manipulation or content farm. While no scripts were explicitly extracted, the presence of numerous external links indicates a pattern of directing users to potentially malicious or deceptive content, possibly as a precursor to further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 https://jottigo.ru/123?utm_term=2004+honda+odyssey+rear+tire+size
    • https://cdn.sqhk.co/jogeguzotire/pWqhdnI/race_car_hill_climb_racing.pdf
    • https://cdn.sqhk.co/lusajiki/aiezhnT/smoothie_maker_reviews_australia.pdf
    • https://cdn.sqhk.co/nilulugaj/yvjihfD/84432878393.pdf
    • https://bovopoboj.weebly.com/uploads/1/3/0/7/130776351/897178.pdf
    • https://cdn.sqhk.co/wolitobutak/i80Yhch/minecraft_skywars_io.pdf
    • https://cdn.sqhk.co/lexoxuxoluvi/C6xtibL/truck_driver_free_download_for_pc.pdf
    • https://cdn.sqhk.co/waxolulum/dWhiih5/big_bang_evolution.pdf
    • http://vosalax.22web.org/android_architecture_components_proguard.pdf
    • https://jazebaza.weebly.com/uploads/1/3/4/6/134662006/divalerafowag.pdf
    • https://risonozolediwar.weebly.com/uploads/1/3/1/3/131398017/f81f7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://rolodumom.epizy.com/33084745554.pdf
    • https://s3.amazonaws.com/kotenu/jubilate_sheet_music.pdf
    • https://s3.amazonaws.com/gidibesuxi/tubok.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da09.bin
b3e0f59b59441d99683e3d8ae6e1dc9321b79d49c83525677cce7eb7d36514c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA09 5300 bytes
font_01_sfnt_off0000ec17.bin
cf03ed0e3ef0b97a049d34b310d7800906a45861cf11316c8b20ac4c9d3a9ace		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC17 11744 bytes

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