PDF malware analysis — malicious · bf0b0a57dfb3d6d6

MALICIOUS

PDF

77.1 KB Created: 2021-04-02 00:23:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30

MD5: 48412a75fdd380d92aecdb4f2e041500 SHA-1: 9e633078fdcfb6bc775ae0b0aec98bacd15bb722 SHA-256: bf0b0a57dfb3d6d6f7da59a43070df9ff39c5d8f31125146807eaf90455f955d

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent link pointing to 'bologen.ru', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains metadata related to 'wkhtmltopdf' and a product name, possibly used as a lure.

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://bologen.ru/aws?utm_term=troy+bilt+tb200+550e PDF link annotation
- http://sujiwajarow.22web.org/72043098886.pdfIn PDF document text
- http://josebixotarez.22web.org/70128261895.pdfIn PDF document text
- https://jaluzirilunotu.weebly.com/uploads/1/3/2/6/132681851/3984121.pdfIn PDF document text
- http://leririv.sportsontheweb.net/is_billy_elliot_on_netflix_canada.pdfIn PDF document text
- http://pavubase.iblogger.org/academy_xperts_mikrotik.pdfIn PDF document text
- https://laziboxejebemu.weebly.com/uploads/1/3/0/7/130740401/diwajurel.pdfIn PDF document text
- http://nefuzixitelu.iblogger.org/56055491817.pdfIn PDF document text
- http://vovadot.22web.org/sweatcoin_hack_mod_apk.pdfIn PDF document text
- https://koxowugazetumul.weebly.com/uploads/1/3/6/0/136015765/bakodowobowiso-luguvuwuxob.pdfIn PDF document text
- http://motorutovibipe.sportsontheweb.net/83327115259.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/39d79035-233d-41c7-a70d-2595f346144d/jitubijoxexil.pdfIn PDF document text
- http://rofixalo.epizy.com/32007454293.pdfIn PDF document text
- http://sojoxorizupeza.rf.gd/sesion_buen_inicio_del_ao_escolar_2019.pdfIn PDF document text
- http://jugomirusulove.atwebpages.com/android_versions_list_download.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/acbed7d6-c9f3-44de-a58b-d07a8afc3b6b/how_do_i_connect_my_brother_printer_to_my_wireless_network.pdfIn PDF document text
- http://bituzemonupekot.epizy.com/99084066149.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a13baa34-6792-4ba7-95b3-7b0b3a44141a/penogoxelopajopa.pdfIn PDF document text
- http://gafelen.epizy.com/all_the_bright_places_book_quotes_with_page_numbers.pdfIn PDF document text
- http://fabedidatifi.onlinewebshop.net/conversion_of_isometric_views_to_orthographic_views.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/182937de-7d12-4be2-8a6b-07966888fed6/xizenibagena.pdfIn PDF document text
- http://rozevilamires.rf.gd/find_nearby_places_google_maps_api_android_example.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3232ad87-a939-4b11-9642-8398327ea756/82952622771.pdfIn PDF document text
- http://zikoliduxa.atwebpages.com/judetiwagizomiw.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_off0000d8cd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD8CD	4880 bytes
SHA-256: `50fdbe30dc61dcc81ddef309562b6bcd8d497d91763eea1491d8fac76243d63e`
`font_01_sfnt_off0000e986.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE986	11364 bytes
SHA-256: `347de70fc3530305aa2972b28fe2632e7b552d9baf5b8f617a0404d622cb110e`
`font_02_sfnt_off0001100f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1100F	16204 bytes
SHA-256: `a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd`

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