PDF malware analysis — malicious · fa266b717e795af5

MALICIOUS

PDF

78.2 KB Created: 2021-02-21 02:06:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26

MD5: e92b060e4fec1c2726fd679491deea70 SHA-1: aa1a0edb837bcb0a4c7b5908af7a6907ea6bece2 SHA-256: fa266b717e795af5bb50b6ab75215508143196ad9c90c44775df26836040f143

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF file detected as malicious by ML classifiers and ClamAV. It contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The PDF's structure and embedded links suggest it is designed to redirect users to malicious websites, potentially for credential harvesting or further payload delivery.

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://seumenha.ru/wix?keyword=momentum+and+impulse+worksheet+answers+cstephenmurray PDF link annotation
- https://talovilivakalod.weebly.com/uploads/1/3/5/3/135326419/e88994b.pdfIn PDF document text
- https://xeneniwavufew.weebly.com/uploads/1/3/2/8/132814439/fexiduliw.pdfIn PDF document text
- http://kuxidubavez.iblogger.org/62797303897.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4409092/normal_5fe05d4ed0fcc.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4459478/normal_602d41f34dadb.pdfIn PDF document text
- https://wabatopopelak.weebly.com/uploads/1/3/0/7/130775953/siwokelorogelabutese.pdfIn PDF document text
- https://wopeduvolevim.weebly.com/uploads/1/3/0/7/130776212/wuvaxowadolibuvosome.pdfIn PDF document text
- http://tovarzone.ru/terimefuzped7o.pdfIn PDF document text
- http://zhenskiizhurnal.ru/free_serial_number_and_product_key_for_autocad_2016ndzia.pdfIn PDF document text
- https://vawemuziz.weebly.com/uploads/1/3/5/3/135351027/tudomoderib.pdfIn PDF document text
- https://sebumeganajili.weebly.com/uploads/1/3/0/8/130874272/farifokijukinuxexi.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4475208/normal_5fdc723cd3d3c.pdfIn PDF document text
- https://zerimesatevig.weebly.com/uploads/1/3/4/8/134879836/xobibepu.pdfIn PDF document text
- https://jozevupipe.weebly.com/uploads/1/3/5/3/135346753/zunuju.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4492546/normal_5fd6598e81297.pdfIn PDF document text
- http://br1.red/candy_land_instructionsad1mi.pdfIn PDF document text
- http://alphabitx.com/how_long_is_paternity_leave_for_federal_employeesd8p3k.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4460682/normal_5ff9b874a9921.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4452395/normal_600f2f90c4a7a.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4494166/normal_5ff531f70fc8f.pdfIn PDF document text
- http://bionatur.space/shaolin_soccer_download_in_tamilyqm8w.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4380691/normal_5ff4df7acfb21.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://bumezemenunaxiv.epizy.com/cellulose_acetate.pdfIn PDF document text
- http://nekeromufuribel.rf.gd/how_to_hold_snare_drum_sticks.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_off0000e63e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE63E	5456 bytes
SHA-256: `501432e734bdffd5fd3dcc8b9fb5e3921355866701db0f64e750f51ddeb3da43`
`font_01_sfnt_off0000f8b4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF8B4	10584 bytes
SHA-256: `fe0ea47c09fc9246ce6248ff457d5d85d8bc133abb23115f5e9df149fcadc786`
`font_02_sfnt_off00011cea.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11CEA	4324 bytes
SHA-256: `1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e`

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