PDF malware analysis — malicious · 717657260e991229

MALICIOUS

PDF

84.7 KB Created: 2021-03-12 19:07:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: 0bae4d15c59f4e6080e722430590c131 SHA-1: b8ac9efab7a0c344a0e3e171d57cf78d50c21d77 SHA-256: 717657260e991229e6d631bb37f7ded0bc7724b5c78df098e8ba306044242571

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including PDF_SEO_LINK_FARM and PDF_SEO_UTM_REDIRECTOR_LINK, indicating it's part of a link farm designed to redirect users. The ML classifier and ClamAV also identified it as malicious. The primary IOC is the redirector URL, which likely leads to a phishing page or malware download.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK

PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
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://jottigo.ru/123?utm_term=vs+code+format+json+shortcut PDF link annotation
- http://dehydratedoriginalgoodness.com/sample_demand_letter_to_contractor_to_complete_worki5525.pdfIn PDF document text
- http://bcpzonasegurape2-viabcp.com/30377980917vkicf.pdfIn PDF document text
- https://zumikifekov.weebly.com/uploads/1/3/0/8/130813997/671727f1d0d.pdfIn PDF document text
- https://zukigepuzena.weebly.com/uploads/1/3/4/5/134593101/3439574.pdfIn PDF document text
- https://pivozedotafi.weebly.com/uploads/1/3/1/0/131070355/kemarexupozedi.pdfIn PDF document text
- https://babinekisifuve.weebly.com/uploads/1/3/2/6/132696104/gozipinewubaxa_buwuzoxiwu_jowup_jevugokepebiko.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/kewakuko/tamil_film_baby_video_song.pdfIn PDF document text
- https://s3.amazonaws.com/bejenosugede/73666815047.pdfIn PDF document text
- https://s3.amazonaws.com/gogunabones/13251833815.pdfIn PDF document text
- https://s3.amazonaws.com/sefabe/what_are_the_three_types_of_warehouse.pdfIn PDF document text
- https://s3.amazonaws.com/lazolu/chhota_bheem_krishna_kirmada_movie.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9d2857f8-c7d6-40cf-b36f-3a939a1fe3f0/which_religion_came_first_christianity_or_judaism.pdfIn PDF document text
- https://s3.amazonaws.com/rebomedug/rinepijosuwudukekirijig.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4cfd8435-2365-4a57-aeea-351d5e6400fb/pokemon_go_promo_code_iphone.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/be6fda80-1c21-4431-913e-a6a10c40a36b/dark_souls_remastered_pc_review.pdfIn PDF document text
- https://s3.amazonaws.com/ziwuvijevo/loronukubajupadalisila.pdfIn PDF document text
- https://s3.amazonaws.com/zunewidimem/billing_information_l_g.pdfIn PDF document text
- https://s3.amazonaws.com/xedewofuretujo/58326886023.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_off0000f688.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF688	5268 bytes
SHA-256: `094a88bfdbd1d065ff313638e4330aa3608d36a42adf83429cf1cbeeb136ac0b`
`font_01_sfnt_off0001084f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1084F	11868 bytes
SHA-256: `948da3bd91af13f07b6381e3b7a1d9ea0066736723f13a8649d01b6ffa9e14bd`
`font_02_sfnt_off000130a5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x130A5	16092 bytes
SHA-256: `c0a2658b41d639f606eba7091e87e8bd42a81d8ac063310e149400b84daa429e`

Open this report in the interactive analyzer, or submit your own file for analysis.