Malicious PDF — malware analysis report

Static analysis result for SHA-256 75855d2b92b1490f…

MALICIOUS

PDF

74.3 KB Created: 2021-03-17 14:44:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84717dacdc1655c957818f7379ee645e SHA-1: 9191168f5b93343faf18cd96af4a72bdd4a1f910 SHA-256: 75855d2b92b1490fcf62ee2075533a14144f1f9bd08a821048657448d008e0a9
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and one specifically linked to a search query for an idiom. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of external URIs and link farm heuristics suggests the document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://botokaw.ru/strik?utm_term=what+does+the+idiom+man+of+the+house+mean
    • https://cdn.sqhk.co/xaloridinef/if1jcij/101-_in-_1_games_nordcurrent.pdf
    • https://static.s123-cdn-static.com/uploads/4449615/normal_5fdebaf2ebbaa.pdf
    • http://zofanelo.22web.org/89570084610.pdf
    • https://cdn-cms.f-static.net/uploads/4383680/normal_601a5840459a6.pdf
    • https://cdn.sqhk.co/vadavenaw/jihjieZ/37826431148.pdf
    • https://kopepadozuko.weebly.com/uploads/1/3/4/5/134505487/4979a.pdf
    • https://cdn-cms.f-static.net/uploads/4447251/normal_604a1afd72a1a.pdf
    • https://masevaru.weebly.com/uploads/1/3/5/3/135346062/nufuvajemuxa-repukowekubako.pdf
    • https://cdn.sqhk.co/lagitesavap/aVfjfDo/puverurumudixegosixixune.pdf
    • https://cdn-cms.f-static.net/uploads/4407724/normal_600f1e7a7a11e.pdf
    • https://cdn-cms.f-static.net/uploads/4481527/normal_5fdc79851c0d6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://diruxepuf.epizy.com/52384846637.pdf
    • http://guxudapese.epizy.com/42728780671.pdf
    • http://fafezevasuba.rf.gd/nenokamuxadawadipa.pdf
    • https://s3.amazonaws.com/joterige/76815668972.pdf
    • http://buzekarutazobe.rf.gd/tekuguwa.pdf
    • http://gesebokumu.epizy.com/gilmour_impulse_sprinkler_adjustment_instructions.pdf
    • http://pimisigejofal.rf.gd/aprender_a_tocar_violo_iniciante.pdf
    • https://s3.amazonaws.com/savukojubusum/anandamela_pujabarshiki.pdf
    • https://s3.amazonaws.com/gitipelut/bluestacks_for_windows_7_free.pdf
    • http://tokejavopif.rf.gd/zutizaxigeruz.pdf
    • http://dekubovuvupo.epizy.com/xobarowebutaximesowawife.pdf
    • http://sebukojuteropib.rf.gd/autocad_2018_for_mac_tutorial_for_beginners.pdf
    • https://s3.amazonaws.com/xirixepo/82751837808.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_off0000e63e.bin
39d0194101f56405d0ee19ec2f5509021bc22eb02a1a3bb59b4922d643bd5f8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE63E 5032 bytes
font_01_sfnt_off0000f748.bin
90988c6e963c562ef2e9433cc0014b59ee938f3a5be44d3d2616634b0c319728		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF748 10748 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.