PDF malware analysis — malicious · 03492a211633f4dd

MALICIOUS

PDF

80.2 KB Created: 2021-03-21 23:04:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23

MD5: aaad6d4fb64f7bb581046d6d5dd09814 SHA-1: c5dc2c35c46d47d9348e28cd42838b13d5c21bd5 SHA-256: 03492a211633f4dd10e235603bed72245becdefa2d3aa921b12c4d3648f3a58f

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting it functions as a link farm. One of the primary URLs, 'https://resalured.ru/strik?utm_term=monkey+wrench+gang+r+crumb', is likely used to redirect users to malicious content or phishing sites. The presence of embedded URLs and the overall structure point towards a phishing or SEO spam campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

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://resalured.ru/strik?utm_term=monkey+wrench+gang+r+crumb PDF link annotation
- https://gisunada.weebly.com/uploads/1/3/1/4/131409009/d8812.pdfIn PDF document text
- https://puvomowaja.weebly.com/uploads/1/3/4/3/134318832/1703687.pdfIn PDF document text
- https://kazarebowuw.weebly.com/uploads/1/3/5/9/135972211/zapubagewex.pdfIn PDF document text
- http://specrazreshenie.com/android_studio_project_root_directorya32ux.pdfIn PDF document text
- https://lulofaki.weebly.com/uploads/1/3/1/4/131453598/3eac731c.pdfIn PDF document text
- https://cdn.sqhk.co/lexelinowe/jitiiCH/blueberry_goat_cheese_ice_cream_recipe.pdfIn PDF document text
- http://nyvelsets.online/75674038446fc2i8.pdfIn PDF document text
- https://cdn.sqhk.co/tumosirewuw/fjj0d3k/2048_cool_math_games.pdfIn PDF document text
- https://cdn.sqhk.co/tavedikovo/ggfRje0/36115771838.pdfIn PDF document text
- http://goldstein.berlin/96668916308dajkc.pdfIn PDF document text
- http://swiss-family.space/gupizesoforagopewewosaqwcpl.pdfIn PDF document text
- http://microbladingcertificationdfw.org/wuturumqb0xs.pdfIn PDF document text
- http://shoes-storie.club/thesaurus_rogethw6bb.pdfIn PDF document text
- https://zajosozuxisofe.weebly.com/uploads/1/3/1/4/131407459/d3f4dcbf.pdfIn PDF document text
- https://cdn.sqhk.co/xuxawexa/hjgjfaK/infant_weight_conversion_pounds_to_grams.pdfIn PDF document text
- https://cdn.sqhk.co/werutojij/hfgfxid/checkers_pizza_trumann_menu.pdfIn PDF document text
- http://unlockdeals.shop/32507900035w23vo.pdfIn PDF document text
- http://repair-telefonov.ru/nenezeh6ay.pdfIn PDF document text
- http://bcpzonasegurape2-viabcp.com/download_3d_models_for_sketchup_2016fxu8x.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://50b44c92-959e-4a15-bf83-93d6b2b518d6.filesusr.com/ugd/3ed44c_b62ab5a89947402cb17d7e16f0b6f247.pdf?index=trueIn PDF document text
- https://a91f1da9-0b84-486d-9199-d95c2ecdf19f.filesusr.com/ugd/82421a_f317f37505b44590990954937ba0ff72.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_off0000ee5e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE5E	5160 bytes
SHA-256: `67318435da7621c6a4d6a384d3d41ca570ae67601225c2c60fd60ff1c934cf15`
`font_01_sfnt_off0000ffd2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFFD2	10932 bytes
SHA-256: `c2e4bec9c8a9950c858d9c49c972073c99d34a86e58d10a7a56cbeaff1adf8a0`
`font_02_sfnt_off0001257d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1257D	4324 bytes
SHA-256: `9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2`

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