PDF malware analysis — malicious · f33ad642b98f8b6c

MALICIOUS

PDF

78.7 KB Created: 2021-05-15 19:26:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25

MD5: 10abcddf698997c624bf3160eab90e67 SHA-1: 2886b7526b585c4969be39c5de1d06df14870b58 SHA-256: f33ad642b98f8b6c742787679e01e01d967c87b504bce72059acc4e36a5c863b

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting, indicating a link-farming or phishing campaign. The presence of external URIs and the nature of the heuristics suggest the document's primary purpose is to redirect users to potentially harmful websites.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

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://xezojetit.ru/strik?utm_term=p%2526id+symbols+positive+displacement+pump PDF link annotation
- https://cdn-cms.f-static.net/uploads/4379385/normal_60226380cdcbd.pdfIn PDF document text
- https://cdn.sqhk.co/navotezive/WkKhdjj/archery_shops_in_michigan.pdfIn PDF document text
- http://vurujupafowutox.mypressonline.com/can_you_gain_weight_from_almond_milk.pdfIn PDF document text
- http://gedagefi.22web.org/95658117999.pdfIn PDF document text
- https://cdn.sqhk.co/jawadagive/WieQCZI/35165906425.pdfIn PDF document text
- https://cdn.sqhk.co/nupozifulija/ibcx2hR/sekenunadedipawabuz.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4469143/normal_605ee993a1195.pdfIn PDF document text
- https://cdn.sqhk.co/dunokufimove/ie6ljcn/lindex_baby_size_guide.pdfIn PDF document text
- http://saramofupoke.iblogger.org/all_battery_types.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4477864/normal_5ff526c3e72d2.pdfIn PDF document text
- http://vumajuzatijerak.getenjoyment.net/hamilton_beach_soft_serve_ice_cream_maker_recipes.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4404124/normal_5fc6d536711e8.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://wedusumefixikeg.rf.gd/vavifagitega.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d65edc7b-1168-4d2b-b332-e8d9c1303c60/vanerepifaguz.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a85112df-8297-4860-9d77-4d54753d3bb1/guxivuguxemoxuwajux.pdfIn PDF document text
- https://s3.amazonaws.com/lopadivupudexa/febrile_neutropenia_treatment_guidelines.pdfIn PDF document text
- http://sonarubitexo.atwebpages.com/sample_bio_data_download.pdfIn PDF document text
- http://dufojamimusim.atwebpages.com/vonefugagopekate.pdfIn PDF document text
- https://s3.amazonaws.com/xazarujokemus/arabic_calligraphy_learning_books.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/883913a2-432b-46a8-a06c-69bb300981e1/adventure_time_city_of_thieves_snail.pdfIn PDF document text
- https://s3.amazonaws.com/kulinisokakewi/52921813653.pdfIn PDF document text
- https://s3.amazonaws.com/vikukinumet/cartoon_network_guide_australia.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/cd89b688-7d00-4673-b238-39ebcb0e38dc/pivuluvasuxibibula.pdfIn PDF document text
- https://s3.amazonaws.com/xukanomarexumu/54807407380.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_off0000ee74.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE74	3484 bytes
SHA-256: `1917b55f20b74eaafc0ee8a5ca0b0adaea781de24422e3cf19f76cfa298dac88`
`font_01_sfnt_off0000f9d7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF9D7	10968 bytes
SHA-256: `b9529452b2708c05e30c594a16b103f4b9e18b699700396fecfdff3f53340c39`
`font_02_sfnt_off00011f6d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11F6D	4324 bytes
SHA-256: `d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378`

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