PDF malware analysis — malicious · 774f4c960e6bdbe5

MALICIOUS

PDF

172.0 KB Created: 2021-03-17 14:06:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28

MD5: d8ede79a2f227fdbb3ca7d01f9b3a579 SHA-1: 4251495761af5fc2d40bae630cdd52c006a9f2fc SHA-256: 774f4c960e6bdbe58fc71a62e3eda25af3185954744476496159350830772c6e

166 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of external URIs and the 'password-protected archive lure' heuristic suggest the document is designed to trick users into visiting malicious sites or downloading password-protected malicious files.

Machine Learning

Nyx PDF Classifier malicious score 0.9993

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
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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://dugedepap.ru/strik?utm_term=tp-link+tl-wdr4300+dd-wrt PDF link annotation
- http://gikadoketu.iblogger.org/xevukewopegeludidaj.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4414352/normal_604e2a94a4afa.pdfIn PDF document text
- http://legrand-spb.ru/95_confidence_interval_z_score_1.96w2dep.pdfIn PDF document text
- http://fruit-citrus.space/fleck_5600sxt_valve_manualckc3i.pdfIn PDF document text
- http://meblik.su/nuvonu0c2zi.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4494432/normal_60517290bb1ef.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4454822/normal_5fec7570f2873.pdfIn PDF document text
- http://mozexuragosiv.iblogger.org/do_i_need_to_capitalize_mom_and_dad.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4480588/normal_60509a26b177e.pdfIn PDF document text
- http://tokemiji.22web.org/easy_guitar_songs_with_chords.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://nijufunirel.rf.gd/how_many_pages_are_in_the_7_harry_potter_book.pdfIn PDF document text
- http://vuremekewema.rf.gd/visa_on_arrival_form_for_thailand.pdfIn PDF document text
- http://sikirubuguje.epizy.com/repunir.pdfIn PDF document text
- https://s3.amazonaws.com/fupanabivote/that_evening_sun_summary_sparknotes.pdfIn PDF document text
- http://goregined.rf.gd/cambridge_global_english_coursebook_8.pdfIn PDF document text
- https://s3.amazonaws.com/belopudevuzuza/xowivusidofuvowosisataxix.pdfIn PDF document text
- http://sefibonep.rf.gd/no_more_water_the_fire_next_time_meaning.pdfIn PDF document text
- https://s3.amazonaws.com/voxulija/pandora_s_box_6_manual.pdfIn PDF document text
- http://liwumakagizir.rf.gd/ruzigarakebikegakes.pdfIn PDF document text
- https://s3.amazonaws.com/mubefula/cara_memainkan_brigandine_di_android.pdfIn PDF document text
- https://s3.amazonaws.com/mubemutolewe/aneurisma_fusiforme_da_aorta_toracica_ascendente.pdfIn PDF document text
- http://newubopuga.epizy.com/what_are_the_three_types_of_zodiac_signs.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_off00024b78.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x24B78	5096 bytes
SHA-256: `22a6683b519fac9e0e4b4fbfb81b2462f270d0737d26258e195c0d20c88fdce3`
`font_01_sfnt_off00025d08.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x25D08	15260 bytes
SHA-256: `53979d009cbe6dfd528e70ce8c8e58b328ec4b397676307f6a82a22bbf43f75c`
`font_02_sfnt_off00028b53.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x28B53	16132 bytes
SHA-256: `0845746d8e0f76c2c57e53a5d0c2d2ba36ed31c4724e2802406f297ba1795667`

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