PDF malware analysis — malicious · fb234a8c8aea2c5a

MALICIOUS

PDF

78.4 KB Created: 2021-04-02 20:52:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25

MD5: 2d185f7230f9c91f4b39777e5b45b79f SHA-1: 0487788d3217778fd7ccc3aa58baa2e37f1aa7bd SHA-256: fb234a8c8aea2c5a0b60328721a2d19637740efa93eb253cf79ef30a0b832a9a

194 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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.
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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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/123?utm_term=cleaning+log+template+excel PDF link annotation
- https://belexikezetuvom.weebly.com/uploads/1/3/0/7/130775063/fupikuvakefaw_judugojapuzo.pdfIn PDF document text
- https://gofupadosu.weebly.com/uploads/1/3/4/8/134853885/panoduzunojud_rimewufevugebag.pdfIn PDF document text
- http://arenaprobet.com/79744321043sdxh.pdfIn PDF document text
- http://idealsit.space/jonebiwameviluzovisodud9hr7u.pdfIn PDF document text
- http://scotiaenlineape-personas.com/574015525378813h.pdfIn PDF document text
- https://todumubisopid.weebly.com/uploads/1/3/5/3/135312552/fidinubokumurepaleta.pdfIn PDF document text
- http://helplnstagramcontact5087423.com/bemulafitoz4z51k.pdfIn PDF document text
- https://gibetixogi.weebly.com/uploads/1/3/1/6/131636946/guvinevukakukow.pdfIn PDF document text
- http://nesobaka9.xyz/us_forces_strictly_limit_their_influ0h9ue.pdfIn PDF document text
- http://mazafaka69pussy.online/67615137304qmfhn.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://uploads.strikinglycdn.com/files/58b25853-8c6b-469c-a602-5deac8ad0537/64944601536.pdfIn PDF document text
- https://s3.amazonaws.com/nitidadufetenu/23162388756.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c56703a9-ea2e-4421-bb9b-9819ce3f1061/das_feriados_en_mxico_2020.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5727c50d-48b9-46ee-8c55-d4ca90af5dd6/why_is_she_not_replying_to_my_texts.pdfIn PDF document text
- https://s3.amazonaws.com/vabedafozo/92166227205.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a0036420-9f4d-4ef9-8f8b-5ff5e491d537/gonodubexokeri.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/dcf8e64e-73bc-48ba-9352-e209d860f5b7/basic_computer_hardware_repair_free_download.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ed4df236-0806-4b67-9743-022e41a62ed6/92741461763.pdfIn PDF document text
- https://s3.amazonaws.com/napejaxosinages/fitbit_charge_2_hr_watch_bands.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_off0000e9a9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE9A9	4856 bytes
SHA-256: `296b768d8e0e5b7f7f8bbdfe871959727d65b4fb33a3bc8841aeefd810cc79ac`
`font_01_sfnt_off0000fa24.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA24	10464 bytes
SHA-256: `1f639763ae9912a6279efe9bb495f2576d7e3dbb5407aa5821b2e715a88be3aa`
`font_02_sfnt_off00011dc3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11DC3	4324 bytes
SHA-256: `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`

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