Malicious PDF — malware analysis report

Static analysis result for SHA-256 b45927494d032d0f…

MALICIOUS

PDF

40.4 KB Created: 2020-05-18 19:31:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33dcb68875f7d6f4f8e15c757c5099e5 SHA-1: c32b165d9dea24eeecbbe825d86969c65dd4c284 SHA-256: b45927494d032d0fff200b16984210f33e27ba4f47505c8c7b3ead611af4004c
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links to various domains, many of which follow a similar numeric or slug-based path structure. This pattern is indicative of a link farm or SEO manipulation tactic. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, and the document body is heavily obfuscated, preventing a deeper analysis of its specific intent beyond link distribution.

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://referral360network.com/uploads/1/3/0/7/130775115/130775115.html#formule+diviseur+de+tension
    • http://transcendhealingcentre.org/uploads/1/3/0/2/130289189/sopof_mokiwovituxow_lujadotujifuve_fevipowuwemodu.pdf
    • http://majesticmousepads.com/uploads/1/3/0/5/130539987/vujoluwugeke.pdf
    • http://lyckhemgard.com/uploads/1/3/0/6/130621000/6023115.pdf
    • http://bgallagher.solutions/uploads/1/3/0/3/130323957/7314576.pdf
    • http://incprollc.com/uploads/1/3/0/4/130477287/1bffe932b.pdf
    • http://winterwoodwoodventures.com/uploads/1/3/0/5/130543272/4721400.pdf
    • http://stmichaellincoln.net/uploads/1/3/1/3/131398232/muzozirufuguf-bemetudotogisiw-jozugawis.pdf
    • http://floridavra.com/uploads/1/3/0/2/130273740/zupunopex.pdf
    • http://shadowcroft.com/uploads/1/3/0/3/130313105/467ba2853aa96fc.pdf
    • http://lenotaire.ch/uploads/1/3/0/5/130590108/gutozujoxe.pdf
    • http://modernluxury.ca/uploads/1/3/0/7/130775052/nalupis_dexijifu_gobivorosu_gajagaf.pdf
    • http://destinationtexas.cc/uploads/1/3/0/7/130776374/gubexixil.pdf
    • http://gslpgtroop147.com/uploads/1/3/1/3/131381433/501129.pdf
    • http://yogaloungeofchattanooga.com/uploads/1/3/0/6/130639355/rojibiwof.pdf
    • http://natbayley.com/uploads/1/3/0/5/130590420/tuwokixa_tizubozanotosuw_majuwuwi_sorewosumow.pdf
    • http://decobe.net/uploads/1/3/0/5/130551505/pagaxisiwe.pdf
    • http://cometothewellcoaching.com/uploads/1/3/0/7/130738945/23d6d9895.pdf
    • http://doctors-daughters.com/uploads/1/3/0/7/130775489/xavinatexozatof.pdf
    • http://randynazarian.com/uploads/1/3/1/4/131407111/lovipafojagetusefuz.pdf
    • http://mainetourismtravel.com/uploads/1/3/0/2/130288321/sovaminikefujixogige.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_off000068e8.bin
d8c1ff549398f8789bf2db595eaac94fc367f5862dc2525b83ffa0206fc37d88
pdf-font-stream PDF embedded font (sfnt) at offset 0x68E8 13712 bytes