PDF malware analysis — malicious · dc71493b8043aabc

MALICIOUS

PDF

77.5 KB Created: 2021-04-30 16:45:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23

MD5: 44eabc911736746b585939f0d94b5b7b SHA-1: 0b7091692833b43b955fdf386365abaacc321dee SHA-256: dc71493b8043aabcda135e84d1eb0df5693987566f6ff0d81cfceab3466ae3e5

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs, with a primary focus on 'fokemale.ru', suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

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://fokemale.ru/strik?utm_term=chamberlain+universal+mini+garage+door+remote+manual PDF link annotation
- https://cdn-cms.f-static.net/uploads/4414341/normal_602c74a73f163.pdfIn PDF document text
- http://ductsunlimitedins.com/2018_monthly_calendar_template_google_sheetsjabkg.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4487626/normal_5ff5a3b3b6414.pdfIn PDF document text
- http://mujojodisi.22web.org/.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4482190/normal_606cc4b97fd62.pdfIn PDF document text
- http://sfr-webmail.com/porazelowexotaxejum4y9y8.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4459478/normal_600b0be9623f1.pdfIn PDF document text
- http://gatorama.site/red_storm_rising_board_game7stjx.pdfIn PDF document text
- http://skidki-day.site/japelivazulekitaweqkymd.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4388276/normal_6058127d5799d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4496616/normal_601b4d9b8c66a.pdfIn PDF document text
- http://wofijitabudo.22web.org/vamumikerenaz.pdfIn PDF document text
- http://interbankdigital.com/word_nut_game_freemzxwr.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4385026/normal_60150bd6a508c.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4416653/normal_5fca4678a9fd0.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://uploads.strikinglycdn.com/files/a0516636-5421-4cb7-816b-fa94b90bb878/how_do_i_reset_my_la_crosse_weather_station.pdfIn PDF document text
- http://javisan.epizy.com/aptitude_questions_and_answers_with_explanation_for_tnpsc.pdfIn PDF document text
- http://vapedefomagejev.epizy.com/english_old_norse_dictionary.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/95d4870e-2c72-4042-a4bb-659ddad3eb60/vamugajibitude.pdfIn PDF document text
- http://videsukow.epizy.com/tufis.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/589dcb82-8748-47bd-8a22-c40e03e1800e/what_is_a_good_weight_loss_program.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b4a3aedc-89c1-4d7a-8bb7-c728a6466b31/how_to_fix_a_noisy_frigidaire_refrigerator.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/453f807e-bb07-4831-a719-9296f03b2418/88657788012.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_off0000dcfd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDCFD	5344 bytes
SHA-256: `4734675ef805cf46b31e2632203d93bf579fdd759369b191c3054e60404ac6e0`
`font_01_sfnt_off0000ef01.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF01	12704 bytes
SHA-256: `4dd7e3fc5da0d2df574ef3a9f955564780b7e855fb73866509398e9b54443497`
`font_02_sfnt_off000119c2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x119C2	4324 bytes
SHA-256: `1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361`

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