PDF malware analysis — malicious · da750e3b02c598d2

MALICIOUS

PDF

80.8 KB Created: 2021-03-05 06:20:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16

MD5: a48dcd5ca42280ff5b7a79f55137dc7d SHA-1: 2e6200ebaa8545b3210010df8f710941dd7aa59f SHA-256: da750e3b02c598d2eb67090ae16430d4372b18623dfed49a668708d56e01cf37

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are used in a link farm, a common phishing tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing sites. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to exploit users through deceptive links.

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://pelibifir.ru/strik?utm_term=data+structures+and+algorithms+using+python+github PDF link annotation
- http://wonder-ita.fun/download_popcorn_time_from_officlial_sitelzstd.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4470029/normal_5fed54878d205.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4414175/normal_5ff8d6ace8454.pdfIn PDF document text
- http://dedukali.22web.org/73816042974.pdfIn PDF document text
- http://pedron.fun/hindustan_petroleum_recruitment_2019_application_form3r5qx.pdfIn PDF document text
- http://maykistore.ru/jazuvuguginiq5ogo.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4501791/normal_5ff846d571081.pdfIn PDF document text
- http://salestore.pro/how_to_train_your_dragon_books_in_chronological_orderghgq2.pdfIn PDF document text
- http://mirror-x.org/zovugejofejorebagotcowge.pdfIn PDF document text
- http://tezibif.mygamesonline.org/are_ge_washers_good.pdfIn PDF document text
- http://bridgecommerce.com/botuxubuxolibuf99zq5.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4410459/normal_5ffb8a89bb359.pdfIn PDF document text
- http://noksipals.online/monday_project_management_software_reviewfs56r.pdfIn PDF document text
- http://coloradocustomelectric.com/sokasezekoxamonibulijezxd7xu.pdfIn PDF document text
- http://homiak.fun/luxikovepujuginqtlwr.pdfIn PDF document text
- http://xplaintome.ru/jedapepidedyrgze.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/rodakarugupoko/binomial_probability_practice_answers.pdfIn PDF document text
- http://gugefojekasarul.epizy.com/free_tri-_fold_brochure_template_publisher.pdfIn PDF document text
- http://zubiluwetij.myartsonline.com/how_to_setup_a_xfinity_remote_to_the_cable_box.pdfIn PDF document text
- https://s3.amazonaws.com/bamepofewalada/gaperasisep.pdfIn PDF document text
- https://s3.amazonaws.com/figugipopar/visosezinu.pdfIn PDF document text
- https://s3.amazonaws.com/jiwisigetizoxif/zitogufibemasu.pdfIn PDF document text
- http://sarutufasiko.atwebpages.com/dakur.pdfIn PDF document text
- http://faleferesevo.onlinewebshop.net/wijavon.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
- 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_off0000e814.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE814	5728 bytes
SHA-256: `2cab730c5caae7a3cc76e12105adcd6c3ca32578719550974d328f4e93301a31`
`font_01_sfnt_off0000fb6d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFB6D	10180 bytes
SHA-256: `e4b41ab790ce58ab4bfafd2bdfa20a25514d3960576c01f885f46447c51d3b78`
`font_02_sfnt_off00011e6d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11E6D	16620 bytes
SHA-256: `b8ca643a0d8ecf3877a58cbcf926263ddc2c762a177edcfc305002a6b67c6f02`

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