PDF malware analysis — malicious · 541c5e075aa3f320

MALICIOUS

PDF

80.6 KB Created: 2021-03-19 17:09:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13

MD5: 13c4af910dce0c72b9c49716ef6dee40 SHA-1: 5a02153feec937f7802b4ec316de309243249f7b SHA-256: 541c5e075aa3f320f3f622dee1005121af69c2039f2af9ae76bdea92539a01a1

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, with one prominent URL pointing to a domain associated with phishing and link farming. The ML classifier and ClamAV detection strongly indicate maliciousness. The heuristic 'SE_URGENCY_LURE' suggests the document attempts to create a false sense of urgency to prompt user interaction with the malicious links.

Machine Learning

Nyx PDF Classifier malicious score 0.9992

Heuristics 6

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.
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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://mezovuduw.ru/aws?utm_term=how+to+add+promo+code+to+wix+site PDF link annotation
- http://wirelessinfo.ru/kevaxelizunenederobimaa52e4.pdfIn PDF document text
- https://pawuzoratifeze.weebly.com/uploads/1/3/4/4/134471058/5657046.pdfIn PDF document text
- http://help-copyrightservice.xyz/diamond_quest_don_t_rush_cheats0hwov.pdfIn PDF document text
- http://wemexuj.22web.org/free_printable_math_worksheets_2nd_grade_fractions.pdfIn PDF document text
- http://zakomuxoza.getenjoyment.net/31130689254.pdfIn PDF document text
- http://albl.ru/continual_service_improvement_register_templatehyy2x.pdfIn PDF document text
- http://gosofejabe.iblogger.org/dadimatogezaxaw.pdfIn PDF document text
- http://vodoroding.info/medical_surgical_nursing_book_brunner_suddarth8afjc.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4446497/normal_5ff139c05af93.pdfIn PDF document text
- https://belexikezetuvom.weebly.com/uploads/1/3/0/7/130775063/f7f079fa234e.pdfIn PDF document text
- http://lapitubemexidi.mywebcommunity.org/what_is_the_command_to_list_all_files_in_a_directory.pdfIn PDF document text
- https://konizalo.weebly.com/uploads/1/3/5/3/135388679/0a4e9ae5a19144.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4446259/normal_5fc80cc7dea56.pdfIn PDF document text
- https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/a6128870b.pdfIn PDF document text
- http://fijazubelanulek.mywebcommunity.org/bokitazopivimado.pdfIn PDF document text
- https://wubenigulusetib.weebly.com/uploads/1/3/4/7/134712949/7869544.pdfIn PDF document text
- http://scotiaenlineape-personas.com/32342642703ot4c0.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://s3.amazonaws.com/sobaketemu/subudi.pdfIn PDF document text
- http://lanobifojedepa.epizy.com/why_does_my_ceramic_heater_keep_turning_off.pdfIn PDF document text
- https://s3.amazonaws.com/zuxime/philosophy_of_technology_assumptions_in_educational_technology_leadership.pdfIn PDF document text
- https://s3.amazonaws.com/zozuxukoxo/a_b_z_form_dna.pdfIn PDF document text
- http://timawerana.epizy.com/gospel_caller_tunes_free.pdfIn PDF document text
- http://rakutekapo.epizy.com/23994315560.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_off0000ee43.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE43	4992 bytes
SHA-256: `c7f9b876b4d00cb62884c015510c98faa21dee88140ec4cc476fb3e6f305e1d5`
`font_01_sfnt_off0000ff4c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFF4C	11040 bytes
SHA-256: `16870732179508d94abf4d7253d25b0450ee0f43e5b6df8679ed0de80e0f5a3d`
`font_02_sfnt_off0001250f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1250F	4324 bytes
SHA-256: `ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3`

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