PDF malware analysis — malicious · fdbb7bc52bed8829

MALICIOUS

PDF

72.4 KB Created: 2021-03-19 21:51:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: f06e9e727bbaf2a6ce9f1dd392a8093b SHA-1: b55458ed56031a1af80ac5fd914bc075ccdf8f47 SHA-256: fdbb7bc52bed8829fa60b9af845fe6cb6ea797e4d8d1a1dbfefc988cc228652a

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm on disposable hosting, with numerous external URIs pointing to potentially malicious or phishing sites. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it was generated programmatically. The presence of embedded URLs and the link farm nature strongly suggest an attempt to redirect 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://pelibifir.ru/123?utm_term=o+babul+pyare+hd+video PDF link annotation
- https://gipivibeg.weebly.com/uploads/1/3/4/3/134341606/netenol_kikazibazud_votir_bobiwomepi.pdfIn PDF document text
- https://romugazasemagop.weebly.com/uploads/1/3/4/8/134897733/528634.pdfIn PDF document text
- http://devgm.design/fifebodojusld4o5.pdfIn PDF document text
- https://cdn.sqhk.co/dukoredod/Qgihfjd/carrom_superstar_mod_apk.pdfIn PDF document text
- https://cdn.sqhk.co/batumozi/dxeheia/butajixad.pdfIn PDF document text
- http://ourfanz.com/the_mis-education_of_the_negrojgh5j.pdfIn PDF document text
- http://lg-supportteam.com/how_to_fix_e3_error_on_air_conditioner6n8lg.pdfIn PDF document text
- https://cdn.sqhk.co/noviraxat/gKhdfjc/botumojoguxamejudirajowar.pdfIn PDF document text
- http://extraterrestrials.space/positive_mind_control_techniques0xdfl.pdfIn PDF document text
- http://instapriz.website/10806012717say7m.pdfIn PDF document text
- https://cdn.sqhk.co/vuramufef/RJ4wnia/14238700487.pdfIn PDF document text
- https://cdn.sqhk.co/fekerepusa/bgdihhg/84675055640.pdfIn PDF document text
- https://zamosokajuzosa.weebly.com/uploads/1/3/4/6/134651904/1122828.pdfIn PDF document text
- http://slmit.space/the_crossing_sacramento_catdjf6.pdfIn PDF document text
- http://profapp.pro/jupoxipujuwurop98l8.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://f18b8dc1-3ce9-44bd-8712-01435d039869.filesusr.com/ugd/b97cba_0411ef36b7114f1fbbe6a1d83a7499df.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/ca3fe6dc-32e9-4684-a33d-2c64b8a1aa95/centerpoint_30mm_rifle_scope_3_12x44mm.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/bc6769d1-43e7-4ec0-8887-0ee9f2bb6a5d/7607116827.pdfIn PDF document text
- https://0f7a2101-273c-4f7f-b1fd-079d1ad923c1.filesusr.com/ugd/a7ea6f_4eda8e36313b4513b87a65e701531142.pdf?index=trueIn PDF document text
- https://9d3edb37-11ce-4d87-b861-4f8d850d55a0.filesusr.com/ugd/0d2aa0_9870fa8c853446fabe80f61fdbeb8245.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/069dcc86-9d32-466c-ad7f-9fc22b1945c9/86922455933.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d237.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD237	4896 bytes
SHA-256: `4f91f426c59cd679305104828ebeeb78fb867df4d57cf29d9122d60f64545a72`
`font_01_sfnt_off0000e2e8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE2E8	10588 bytes
SHA-256: `b66376f11243fc2ff172c71fbba565f6de1333343f648acaf921de9e354a0476`
`font_02_sfnt_off00010668.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10668	4324 bytes
SHA-256: `ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3`

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