PDF malware analysis — malicious · ae6d4e3fe76858d3

MALICIOUS

PDF

88.9 KB Created: 2021-03-04 19:43:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21

MD5: 636ddb813def52849c39445e8d611cc4 SHA-1: e2a8a59046e0c1554a48a3f18c10138e3e421c67 SHA-256: ae6d4e3fe76858d3449dd26459cc9e3de0e39dbc10bab421c0aab999581318df

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous embedded URLs, many of which point to disposable hosting or link farms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to a phishing site or download further malware. No scripts were extracted, but the PDF structure and embedded URIs are indicative of a phishing lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9994

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://xajibur.ru/strik?utm_term=how+to+tell+what+size+my+kitchenaid+mixer+is PDF link annotation
- https://cdn-cms.f-static.net/uploads/4447877/normal_60108d00ba7ac.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4474475/normal_5fc87bd6dfd5b.pdfIn PDF document text
- https://cdn.sqhk.co/kimejijomaki/DwiDghR/gajopasexaj.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4391634/normal_5ff93fc3210c9.pdfIn PDF document text
- http://trastenmyqort.online/pafemelapoww3n7l.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4446789/normal_5febbf3d52655.pdfIn PDF document text
- https://cdn.sqhk.co/piwuzuberaze/6jiFIii/maze_ransomware_ioc_ip.pdfIn PDF document text
- https://cdn.sqhk.co/kojetovukufo/dBXsGAk/84014394083.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4408478/normal_5fdb5d29c3e98.pdfIn PDF document text
- http://uscreditcheck.info/effective_communication_skills_for_teachers_pptye3fo.pdfIn PDF document text
- https://cdn.sqhk.co/guledijuxi/Jiajhjg/magic_dream_tiles_bts_game_4_download.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://a1c9bafd-2917-4c1b-b79c-a4b44a941470.filesusr.com/ugd/f0f215_fca547bda1614c388db4627cd480cf5e.pdf?index=trueIn PDF document text
- https://36425c1f-c329-48aa-845d-1f8252cb45c8.filesusr.com/ugd/01d500_c06a776701804e05be5dfcfa461e755c.pdf?index=trueIn PDF document text
- http://nijorirofebonin.epizy.com/zozudoxikeruregamoxuge.pdfIn PDF document text
- http://gijewitog.rf.gd/pilgrim_at_tinker_creek_chapter_5_summary.pdfIn PDF document text
- http://finesegugumemo.epizy.com/simple_free_facebook_apk.pdfIn PDF document text
- https://6762652a-e869-40f3-960d-1446d4066230.filesusr.com/ugd/55e6b1_c077ccea4b714026aef3c8270fcfad91.pdf?index=trueIn PDF document text
- https://538d8494-0c7d-401a-b890-0485f6bc7bca.filesusr.com/ugd/29c71c_30394b9efceb455db45e46178cb480d7.pdf?index=trueIn PDF document text
- http://vemaxuvigufu.epizy.com/82665904099.pdfIn PDF document text
- http://vajitefafuxuz.epizy.com/halgi_bajau_kya_video_song.pdfIn PDF document text
- http://vadudax.epizy.com/what_is_the_best_outdoor_motion_sensor.pdfIn PDF document text
- https://580b68e3-2104-4118-ae5b-4f285de1c062.filesusr.com/ugd/dad7b5_e96bf61f8015476a85458236020fa5ff.pdf?index=trueIn 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_off00010c9d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10C9D	5304 bytes
SHA-256: `e7422590ca84d2ca407c9dafb8cc5696edebad37a03def7444b48dda14e898ad`
`font_01_sfnt_off00011e93.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11E93	12340 bytes
SHA-256: `7aeb88bbe2580717ee8ce1149c688fbcc861ddb9a698a35abfee7b2a99323da2`
`font_02_sfnt_off000147fc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x147FC	4324 bytes
SHA-256: `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`

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