PDF malware analysis — malicious · 111e185b23708614

MALICIOUS

PDF

76.7 KB Created: 2021-02-15 05:39:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04

MD5: 0397e42bc47243dd90ca12bbc7041068 SHA-1: 17172f197de6cd01da32ffad9f0e028e7d752cc1 SHA-256: 111e185b2370861498c8908938f299a71e1ff344c0517d36cdad1d2a92020d2a

246 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1534 Internal Spearphishing T1059.007 JavaScript

The PDF contains numerous external links, many pointing to disposable hosting services, and is flagged as a credential phishing lure impersonating iCloud. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded links likely redirect to phishing pages designed to steal user credentials.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 7

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH

Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://pisekubil.weebly.com/uploads/1/3/4/3/134322001/23234.pdf.
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://bologen.ru/wix?keyword=icloud+unlocking+process PDF link annotation
- https://pisekubil.weebly.com/uploads/1/3/4/3/134322001/23234.pdfIn PDF document text
- https://cdn.sqhk.co/musutalivun/ih2ijge/escape_alcatraz_game_walkthrough_library.pdfIn PDF document text
- https://cdn.sqhk.co/letojeka/jaQjaha/91596513347.pdfIn PDF document text
- https://cdn.sqhk.co/fifapupifig/jikSiej/cabify_como_usarlo.pdfIn PDF document text
- https://cdn.sqhk.co/rokabumake/ijgfjc4/sutidasuzakelugiv.pdfIn PDF document text
- https://cdn.sqhk.co/tevunufoba/Zggighg/arizona_shooting_hotel.pdfIn PDF document text
- https://cdn.sqhk.co/fawabanof/ngcMZIs/fruits_and_vegetables_quizzes.pdfIn PDF document text
- https://cdn.sqhk.co/sadirorig/8lngdjb/14694057193.pdfIn PDF document text
- https://cdn.sqhk.co/fusifanux/2ghhjeP/dream_holiday_travel_home_design_games.pdfIn PDF document text
- https://tebifuwufarul.weebly.com/uploads/1/3/4/8/134886387/marewefiv.pdfIn PDF document text
- https://linazoforup.weebly.com/uploads/1/3/0/8/130814758/vepewilab-devevipifude.pdfIn PDF document text
- https://vifazadaza.weebly.com/uploads/1/3/4/8/134883600/a8367e44fb0c08.pdfIn PDF document text
- https://wiruxunuv.weebly.com/uploads/1/3/5/3/135324042/6388243.pdfIn PDF document text
- https://janepaxe.weebly.com/uploads/1/3/4/0/134097288/49185295749.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
- http://lubuzasoxevixan.epizy.com/xerox_altalink_b8045_driver.pdfIn PDF document text
- http://sofidubanelen.epizy.com/guide_utilisateur_imprimante_brother_mfc-_j480dw.pdfIn PDF document text
- http://sosodif.rf.gd/89498064149.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_off0000e35a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE35A	4836 bytes
SHA-256: `4774a729f95db7d4a6d070ad3e3545ad7c0326be6629d1c531d65677c4a40b56`
`font_01_sfnt_off0000f3c0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF3C0	10476 bytes
SHA-256: `758e59c7f2bc57572ff30a833da1b58d857c2172557e09041ec861b4a93d89d9`
`font_02_sfnt_off000117a6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x117A6	4324 bytes
SHA-256: `05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176`

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