Malicious PDF — malware analysis report

Static analysis result for SHA-256 151e6bb2cebf369f…

MALICIOUS

PDF

90.1 KB Created: 2021-03-22 16:08:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: dd38d972a17e52f2aae5189b88fa864d SHA-1: 720a18c10f2fac8aff7042a6af9e20eda5c512a3 SHA-256: 151e6bb2cebf369f82a11d030c13e7422038e99150473ab12b555fe63f9b7464
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs pointing to disposable domains and link farms, suggesting a phishing or malware distribution lure. The PDF structure and embedded links are indicative of a spearphishing attachment, likely leading to a compromised website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://golowaki.ru/wix?keyword=swgoh+f2p+ships+guide PDF link annotation
    • https://cdn.sqhk.co/fuvivemu/Ftahajb/55340131729.pdfIn PDF document text
    • http://mezogevap.mypressonline.com/tofabakimumoliludo.pdfIn PDF document text
    • https://cdn.sqhk.co/burexewejam/eYhcIgi/evolvesms_theme_green_hanging.pdfIn PDF document text
    • http://leniwatojetojem.medianewsonline.com/cancer_pulmonar_epidemiologia.pdfIn PDF document text
    • http://kekewawoxugar.sportsontheweb.net/body_pump_workout_routine.pdfIn PDF document text
    • http://dusejetiwogodad.getenjoyment.net/ledebalunowa.pdfIn PDF document text
    • http://xopaberowiwin.getenjoyment.net/passages_by_gail_sheehy.pdfIn PDF document text
    • http://wisatemubudu.medianewsonline.com/xisamexikotivawimipil.pdfIn PDF document text
    • http://palikexifumalam.mywebcommunity.org/wazepetimafitesemusud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415327/normal_602c34ec455e6.pdfIn PDF document text
    • https://cdn.sqhk.co/tunixomaj/dyvFIhc/14414298347.pdfIn PDF document text
    • https://cdn.sqhk.co/tatolodam/cax4geo/messages_light_pink_icon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421056/normal_5fdd3ae5ec8d5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501791/normal_5ff16aa5ad024.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462096/normal_5fd1834de4f31.pdfIn PDF document text
    • https://cdn.sqhk.co/wikepijosipi/3NiaQ3J/notification_sounds_iphone.pdfIn PDF document text
    • http://ruvenebigolusep.mywebcommunity.org/beginners_gym_workout.pdfIn PDF document text
    • http://xijulefabogi.getenjoyment.net/pawnee_native_american_tribe_clothing.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368748/normal_5ff3e7842c39c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ferodibev.onlinewebshop.net/gavozinezenoju.pdfIn PDF document text
    • http://vuzuwukef.atwebpages.com/goxuwidipafetojafir.pdfIn PDF document text
    • http://kapirexazi.onlinewebshop.net/zobizunaja.pdfIn PDF document text
    • http://tediguku.atwebpages.com/la_doctrina_sectaria_de_los_adventistas_del_septimo_dia.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000121fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121FA 5292 bytes
SHA-256: 3d1ed7e02e6dbd430a79026ede4950afeb6babff520f454db11f4f62146a9716
font_01_sfnt_off0001341b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1341B 11620 bytes
SHA-256: 96dd8242968f3db6877c32c5196caa9bcc31ce43106068873a04d3adaf1c9229

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