PDF malware analysis — malicious · 338aba95850b16b7

MALICIOUS

PDF

83.2 KB Created: 2021-03-20 21:19:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07

MD5: 28c3aaf0bf62ffac53552b11aa8afb5e SHA-1: 0fa47c5af2b2258ed99d6855b5cd995d74fbe43d SHA-256: 338aba95850b16b7cf64594a2c783d62f5c1019d77d026d383e6f98be8332728

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to disposable hosting, and the document body appears to be a garbled representation of search terms, suggesting a link farm or redirection tactic. The primary IOCs are the external URI and a linked PDF, likely used to direct users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/aws?utm_term=what+does+hard+cheese+mean+in+english PDF link annotation
- http://o-karte-kopilka.com/67556833766x9e9z.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4389354/normal_601e450a7e7e4.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4379471/normal_5fc8d03f87f04.pdfIn PDF document text
- http://umdtheatre.ru/honda_em5000sx_generator_shop_manualenm1b.pdfIn PDF document text
- http://bidetoluji.getenjoyment.net/fusionner_fichier_et_word.pdfIn PDF document text
- http://leledup.mypressonline.com/21429967879.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4446765/normal_5fe33279381ab.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4407747/normal_5fe7849e0c671.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4444648/normal_5fed972e6f0fc.pdfIn PDF document text
- http://predouche.xyz/bright_beginnings_soy_pediatric_drink_nutrition_informationjb803.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4425224/normal_5ff9d6f3cf02a.pdfIn PDF document text
- http://marketitaly.info/d2_maths_book_downloadzzwii.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4393647/normal_60219cff520ce.pdfIn PDF document text
- http://sofuwabafa.iblogger.org/91620781862.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://9ebe8999-295a-4f11-87dc-c96f3e1b46ff.filesusr.com/ugd/8de238_d0e47777fd8c42a8abb9da5f4dd049d8.pdf?index=trueIn PDF document text
- https://68f06c25-eb64-4e0a-94e3-a0e33e610147.filesusr.com/ugd/463ace_2ce55aa07a1d4d29901826491548a097.pdf?index=trueIn PDF document text
- https://459ec6dd-5b69-4322-a182-74abbfaa0e48.filesusr.com/ugd/221eaa_1a6f3ea6f399484793489907164cd78d.pdf?index=trueIn PDF document text
- https://bf23b77b-49a9-4bef-a898-a03cfb94aefa.filesusr.com/ugd/134172_96efd0e84d5045d39317259676a9bc7e.pdf?index=trueIn PDF document text
- http://livirava.atwebpages.com/what_is_the_best_rail_for_ar_15.pdfIn PDF document text
- http://mewudupite.epizy.com/nomenclature_of_restriction_enzymes.pdfIn PDF document text
- https://f11c4bf2-12a6-49f8-9590-07a94b689168.filesusr.com/ugd/11276f_3c19ad0cda654aafa4ca0537a1237e54.pdf?index=trueIn 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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ef8b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF8B	5364 bytes
SHA-256: `4ba0329dd3bda68d05f6a6c926ae8134fa20724372d767dd0a69e8dc0677b387`
`font_01_sfnt_off000101a9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x101A9	11312 bytes
SHA-256: `5f8906c8464990b02cf11e4938501deeefae2f5022cc12e168d6f210921acd3a`
`font_02_sfnt_off0001286c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1286C	16120 bytes
SHA-256: `b6b4a8d5f4f3f91eddb7a1d6191dbf181db8ea9dc6a65dc5bc068d06c7e78db3`

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