Malicious PDF — malware analysis report

Static analysis result for SHA-256 4076c38affd94d4c…

MALICIOUS

PDF

83.0 KB Created: 2021-03-27 16:01:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 713b225c68f4d1db17e70a3646068c7a SHA-1: 1118d3de4af2836ff7edb6a507f116916a2d7c15 SHA-256: 4076c38affd94d4c81735e1db71687cbb83b322e494f65586597f1e87c6033f8
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious phishing content. The document body, though heavily obfuscated, suggests a lure related to a product manual. The presence of external URIs indicates an attempt to redirect the user to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jacksth.ru/wix?keyword=badger+900+plus+manual
    • https://cdn.sqhk.co/famazipow/hyEqYqd/32854054020.pdf
    • https://zufulakoloti.weebly.com/uploads/1/3/5/3/135301661/999246.pdf
    • http://wusozupu.mypressonline.com/the_avengers_1_1963.pdf
    • http://lisuzigerob.mygamesonline.org/38515363025.pdf
    • http://lizowaw.scienceontheweb.net/tasezexejamunig.pdf
    • http://zabolojisag.getenjoyment.net/tupulijinemotapanezurex.pdf
    • http://fajamad.mypressonline.com/miller_bobcat_225g_battery_size.pdf
    • https://cdn.sqhk.co/kugefiruxat/bwghYjg/tugezewigo.pdf
    • http://nugawijuxuv.mywebcommunity.org/tylenol_davis_drug_guide.pdf
    • https://direwuberegenis.weebly.com/uploads/1/3/4/3/134361890/jotakoxejelowome.pdf
    • http://lorubuxetorifa.medianewsonline.com/22573083730.pdf
    • https://cdn.sqhk.co/texivewa/fjgSwu6/modovumepoputepu.pdf
    • https://kegegofelev.weebly.com/uploads/1/3/2/6/132681159/6971180.pdf
    • http://lunagogafoxoj.sportsontheweb.net/77407629766.pdf
    • https://kuxodebareku.weebly.com/uploads/1/3/4/0/134042390/2947721.pdf
    • https://volifinidolil.weebly.com/uploads/1/3/0/8/130873876/8157500.pdf
    • http://tajuliwelofiti.medianewsonline.com/approximation_for_bank_exam.pdf
    • https://cdn.sqhk.co/niserutom/gy22rfS/saudade_band_wiki.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jitawidavez.atwebpages.com/stonehenge_map.pdf
    • http://fuluxewamotate.atwebpages.com/39328804991.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec73.bin
3ac568634582d41fe6cbcdbc40d1ba69959eeae1dbd54532e58b1bcacdb2bb06		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC73 5628 bytes
font_01_sfnt_off0000ff81.bin
e21a791c176d6c6fa2dc758e40f0cea3292d9c2f3bc6b7beebfa78caae137adc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF81 11328 bytes
font_02_sfnt_off000126a0.bin
c64f975c7c74378765a15e192890ba001b575443647995d4109c17b56814fb1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x126A0 16544 bytes

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