PDF malware analysis — malicious · 603c423ebc9407c2

MALICIOUS

PDF

74.6 KB Created: 2021-03-21 07:02:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10

MD5: ce671442cbc8eef5ac8fc79590599905 SHA-1: b8909a25bcd1844d2534f80c02b5695d4e8006b6 SHA-256: 603c423ebc9407c29d90c752c58589596f432bef2597eac825026cd9e37b2c2c

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF containing numerous embedded URLs, many pointing to disposable domains, indicative of a link farm or phishing lure. ClamAV detected it as 'Pdf.Phishing.Trojan', and ML classifiers also flagged it as malicious. The presence of external URIs and the 'link farm' heuristic strongly suggest the document's purpose is to redirect users to potentially harmful websites.

Machine Learning

Nyx PDF Classifier malicious score 0.9989

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://pelibifir.ru/wix?keyword=urban+dictionary+r+words PDF link annotation
- https://cdn.sqhk.co/wekaradukuve/TwghjaW/nephi_s_adventure_2.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4490375/normal_5fdc1bd2d2397.pdfIn PDF document text
- http://nurokojo.mypressonline.com/88027102711.pdfIn PDF document text
- http://bitalotava.scienceontheweb.net/vififusefigorexibogovagow.pdfIn PDF document text
- http://ridaxaki.mywebcommunity.org/casio_hr-8tm_calculator.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4403674/normal_603bdcd31bd08.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4377912/normal_603bb7dbecc10.pdfIn PDF document text
- https://cdn.sqhk.co/bigulikexupa/Fifhiih/tubidy_music_download_free_mp3_audio_download.pdfIn PDF document text
- https://cdn.sqhk.co/zisubiziwu/8kAhg0e/40345296274.pdfIn PDF document text
- http://fofolep.mywebcommunity.org/24166161632.pdfIn PDF document text
- https://cdn.sqhk.co/xidizizo/gHjedjb/big_city_adventure_game_for_pc.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4449781/normal_5fef0b9425dae.pdfIn PDF document text
- http://menuralu.22web.org/fukunopivenitakol.pdfIn PDF document text
- http://kagaromorin.medianewsonline.com/kunesivaridamujubu.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4420903/normal_603ea733dc9bf.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://kaguwetu.epizy.com/how_to_let_go_of_your_demons.pdfIn PDF document text
- http://baxazujokeranu.epizy.com/16387027188.pdfIn PDF document text
- http://dizaxobaka.rf.gd/how_to_connect_jvc_headphones_bluetooth_to_iphone.pdfIn PDF document text
- https://4bf641bf-117a-4913-931f-55e49063997f.filesusr.com/ugd/5befcb_560d132b88744c8e9a4bb11e3bdbdec6.pdf?index=trueIn PDF document text
- https://2987c0f4-171e-4473-b3f1-a5468658115b.filesusr.com/ugd/75ff8a_b71442069be84636a7394f9163db7340.pdf?index=trueIn PDF document text
- http://lizuratudesaxop.epizy.com/jasezoxivowov.pdfIn PDF document text
- http://kakununul.epizy.com/boss_prequest_guide_ariesms.pdfIn PDF document text
- http://sexusig.rf.gd/charles_taylor_philosopher_a_secular_age.pdfIn PDF document text
- http://jajuzefob.rf.gd/kitatubejemewepisilorelub.pdfIn PDF document text
- http://wikusonusi.rf.gd/74079607256.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_off0000daf9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDAF9	4896 bytes
SHA-256: `66f47c66e796a180d80fa1a8c75ef725393391cca34538222a69473d9cea8401`
`font_01_sfnt_off0000eba7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEBA7	10500 bytes
SHA-256: `53bc44bf741e4d0adfcf8e6bcd3e4817c868af428a208e8fa69039a71a643aea`
`font_02_sfnt_off00010f68.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10F68	4324 bytes
SHA-256: `ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3`

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