PDF malware analysis — malicious · 4d859dd6f06c7b1a

MALICIOUS

PDF

77.0 KB Created: 2021-04-20 22:44:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27

MD5: 14d946caed5b775c61701717d41f6ada SHA-1: 10aab0d2afbb585a09b498a3370396e4b095b645 SHA-256: 4d859dd6f06c7b1ab0b79e46e7085b27506402300d363c3dd9c3dba8eddeaa6b

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, many pointing to disposable hosting, suggesting a link farm or redirection mechanism. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves redirecting users to external sites, likely for phishing or to download further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

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/strik?utm_term=fodmap+lista+completa+pdf PDF link annotation
- https://cdn-cms.f-static.net/uploads/4387815/normal_602a55d5e447a.pdfIn PDF document text
- http://epaytds.xyz/what_does_triage_mean_in_jiraxtbmd.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4415754/normal_6069fc12aa07f.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4471249/normal_5ff546deeba72.pdfIn PDF document text
- https://suwisabinupa.weebly.com/uploads/1/3/5/3/135351097/wamebi.pdfIn PDF document text
- http://juilopkiretlo.ru/what_are_the_5_components_of_mission_command868f2.pdfIn PDF document text
- http://de-bewertung-889562.icu/uppababy_vista_black_friday_sale_2019ps8on.pdfIn PDF document text
- http://air-calm2.club/80702208443srcxo.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4454965/normal_5fd31415f395a.pdfIn PDF document text
- https://jamelowo.weebly.com/uploads/1/3/1/6/131606155/e0344.pdfIn PDF document text
- http://helplnstagramcontact6088758.com/fisaxezazejofuqsfo0.pdfIn PDF document text
- https://rabidibizuzej.weebly.com/uploads/1/3/4/6/134648686/0da7984.pdfIn PDF document text
- http://ygrash.website/8981839714pz04c.pdfIn PDF document text
- https://gujibimusexuwub.weebly.com/uploads/1/3/4/0/134042380/216278.pdfIn PDF document text
- http://maska-respirator.com/50878678442tql0.pdfIn PDF document text
- https://dowibowaxetejoz.weebly.com/uploads/1/3/0/7/130740522/xorikotebupases.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4414156/normal_5fcaa44a5d5d0.pdfIn PDF document text
- http://salonhq.xyz/zimunizokivubm5pcf.pdfIn PDF document text
- https://gupovokezatiku.weebly.com/uploads/1/3/4/8/134878629/tikakeletexobadela.pdfIn PDF document text
- https://davixiwawelugez.weebly.com/uploads/1/3/4/1/134133028/9544348.pdfIn PDF document text
- https://nirusiji.weebly.com/uploads/1/3/1/4/131407521/sevul-bipavekomada-nelut.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/f0a2e244-fc40-4ca6-a716-28783d3eefcb/principales_problemas_de_salud_publica_en_mexico.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2ba4e7a6-b980-4adb-8987-2955cdf6028a/blackdecker_uncooked_rice_cooker_3-cup.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/46f448da-dcc2-481e-bdd3-f0280c574e0c/98448466153.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/268cd2c1-3bcb-4d7f-8c5a-102bc7b0d3bb/how_long_to_cook_chicken_wings_in_showtime_rotisserie.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000efb7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEFB7	5160 bytes
SHA-256: `e080b14b502e6108466b4c5655128775a86d1a61270f0984f84c0352ed981f5e`
`font_01_sfnt_off0001013c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1013C	11536 bytes
SHA-256: `e388eab2188310e2804cf27cca668dd62cf29c20318201de22c58817b4db3d13`

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