PDF malware analysis — malicious · 6ef09500eef394f2

MALICIOUS

PDF

80.8 KB Created: 2021-03-07 16:48:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22

MD5: 868fb59751f909fe05e6a9eb5672027f SHA-1: 502d7a7a00cc403dcdd22194b2d8fe116e16f001 SHA-256: 6ef09500eef394f2d15dd470c05c3dfb28c8bbb318a35b9e257f9b0048271320

166 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple heuristics indicating it's a link farm and uses suspicious links, with one specifically noted as an invisible link lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via the embedded URLs. No scripts were extracted, but the PDF structure itself is designed to deceive the user into clicking malicious links.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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
Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE

PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
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://soxebez.ru/123?utm_term=how+long+does+it+take+to+become+an+emt+in+tennessee PDF link annotation
- http://poverkavoda.website/bajaj_allianz_motor_insurancerw3zf.pdfIn PDF document text
- http://zavarivaemvmeste.ru/nasejinopilebewo04a42.pdfIn PDF document text
- http://dalkomis.website/jetuxpcwgu.pdfIn PDF document text
- http://workbykoder.xyz/zewudevuvijunor04uee.pdfIn PDF document text
- http://marafonsport.site/xaboxawaxelazomevivyzktn.pdfIn PDF document text
- http://umniashka.ru/helen_mirren_acting_masterclass_downloadvnj8v.pdfIn PDF document text
- http://dovulup.iblogger.org/jafumaweji.pdfIn PDF document text
- http://premial.su/899325467869s0ge.pdfIn PDF document text
- http://domavera.ru/1790654850112ofi.pdfIn PDF document text
- http://lnstagram-support.live/drawing_made_easy_a_helpful_book_for_young_artistsh954t.pdfIn PDF document text
- http://help-violation.com/new_cartoon_movies_20187om6b.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://foginuv.rf.gd/zajesatetewokewujela.pdfIn PDF document text
- http://madoduv.epizy.com/garidad.pdfIn PDF document text
- http://xedaripa.epizy.com/bluetooth_mouse_for_android_tv.pdfIn PDF document text
- https://1527c8d3-3321-4e9f-872f-e2bebb57bac2.filesusr.com/ugd/bf2d42_2c91d9c095de4a6c98b95faab8adb378.pdf?index=trueIn PDF document text
- https://86f5e18a-8766-4ae7-b9bf-31430b627380.filesusr.com/ugd/911c12_882c5d8654ca4cdeb2b08a2e67eade05.pdf?index=trueIn PDF document text
- https://0e627107-309b-4451-a84d-e7064c41fccd.filesusr.com/ugd/04c368_ae07198abc074e44ab268b8969efd710.pdf?index=trueIn PDF document text
- https://82cb18f6-4a40-4824-ac11-10070f72ce02.filesusr.com/ugd/5aec95_c494469e9a1a4c5c9b969f0dba411e2a.pdf?index=trueIn PDF document text
- https://d89d6b52-6e76-4e18-bccb-bd7428cfddad.filesusr.com/ugd/02beb7_7f8d8fb195be40d0b456e026e4716f66.pdf?index=trueIn PDF document text
- https://7d6e376e-1ee3-4df5-88c1-8d1511d419f8.filesusr.com/ugd/7dd30d_05b753b85cad42868d17987381011016.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_off0000ef6a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF6A	5208 bytes
SHA-256: `e6e3b6b5ffddb0507f00e74e54d64258526bcd43e1b1cd51307b233510191283`
`font_01_sfnt_off0001011f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1011F	11492 bytes
SHA-256: `25fba1723e00f6bdb14b9150bf89ee70930e237468a0853c12a850e24bf81505`
`font_02_sfnt_off000126fa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x126FA	4324 bytes
SHA-256: `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`

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