PDF malware analysis — malicious · 36ed0d07eeb99071

MALICIOUS

PDF

87.9 KB Created: 2021-05-29 22:49:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22

MD5: d953d97f8fa85fce5901618e6fe85c69 SHA-1: 22724a3d7efc989a2c6972b44d69f021c96b2ed1 SHA-256: 36ed0d07eeb99071d08ee2eb3a4bf7f1c4c64b9d31fd7368db1e583f672b2405

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious sites. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

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
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.
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://midufefew.ru/strik?utm_term=can+you+calculate+payback+period+in+excel PDF link annotation
- https://static.s123-cdn-static.com/uploads/4382789/normal_6000d9c4c3591.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4402718/normal_5fc9615b87ffb.pdfIn PDF document text
- https://bubokadorododu.weebly.com/uploads/1/3/4/7/134758236/sewilabawibawexiw.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4468836/normal_5fcd37d76555e.pdfIn PDF document text
- https://sokotomajav.weebly.com/uploads/1/3/4/0/134040389/c1dc8d55395a.pdfIn PDF document text
- https://galewijukinez.weebly.com/uploads/1/3/2/6/132695540/guzipada.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379837/normal_600e703caaa3d.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4446645/normal_5fcbde71e07c0.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4478670/normal_5fcf42229b427.pdfIn PDF document text
- https://zajefogana.weebly.com/uploads/1/3/1/4/131407312/xukodir.pdfIn PDF document text
- https://firedilem.weebly.com/uploads/1/3/1/4/131407958/ruwux_wukafepebeto_nezazow.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4384304/normal_604d6d6d474bf.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4458854/normal_602a07ce831f3.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4385021/normal_60199df793a06.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4377401/normal_60620145c52a1.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4414701/normal_602efc02ea12f.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4445888/normal_5fefdf0ea1b35.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4379471/normal_5fe258d4251bf.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/d32c8fd1-06fc-417f-80c9-31ab9e3bbbbe/83061895210.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0b8e475c-90a3-425f-ad6e-976c17c9cb98/tujibarugibesixa.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c82b11a2-9878-46cb-a402-9aca04da1567/paduvitam.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/22c9f907-03d8-4399-8232-70b1ac2d04d5/6584212409.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/43f47580-1525-441f-a46c-0dcb77759356/zaxawiremimenufafisog.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3599a0fb-6040-48b5-8539-bd0e27ba8832/fevugusaraxese.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c40c8e4f-edc8-4069-be8f-8c94cc63124b/persuasive_essay_intro_paragraph_example.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/18950bf0-7bb9-4790-800f-4fa075fa61e2/drawing_ideas_list_anime.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ccb0f748-63cd-4f0f-95d0-0ef39fb06a60/waxapuzumiwejazup.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000fe6e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFE6E	5168 bytes
SHA-256: `a0dfda3db87e31f2c9bddb5533e18f40a8567eefb512407aba334b1c83d01b51`
`font_01_sfnt_off00011015.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11015	11116 bytes
SHA-256: `5e1fe268a6e60bd6b29c13aee705b032a1cb6cd927351a37a11d6eb5fb50f10d`
`font_02_sfnt_off0001365c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1365C	17240 bytes
SHA-256: `88fe98ff9782d74a5c1317d84d4aee781ffd50936f5a4d293eefa5c7ee91043a`

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