PDF malware analysis — malicious · a92b7ae6f6f3db25

MALICIOUS

PDF

79.1 KB Created: 2021-03-23 15:15:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22

MD5: 360ebe678e1c367f4e186119934d0ad6 SHA-1: 201792a33d09d2180e5e74a3c94463f35f9dc9f0 SHA-256: a92b7ae6f6f3db2569fb01a2b95549768902eda7b247bdeef8f9e9eef723a644

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external links, including one to 'pelibifir.ru', suggesting an attempt to redirect users to potentially harmful sites. The document body is heavily obfuscated and appears to be a lure, possibly for SEO spam or phishing, by referencing 'Speed queen front loader washing machine reviews'. No scripts were extracted from this sample.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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://pelibifir.ru/strik?utm_term=speed+queen+front+loader+washing+machine+reviews PDF link annotation
- https://cdn.sqhk.co/pofilese/fAjhzC5/sinoritidijesikajalasube.pdfIn PDF document text
- https://cdn.sqhk.co/segevenujuka/aTaXYWN/monster_truck_games_online_free_no_download.pdfIn PDF document text
- https://cdn.sqhk.co/fegukajebaj/fig8She/twister_house_iowa.pdfIn PDF document text
- http://confirmationhelpcenter.com/81150891189hhs43.pdfIn PDF document text
- http://itayoga.space/980532840538imt2.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4416316/normal_6021f7daa90a7.pdfIn PDF document text
- http://grizhoff.ru/76050271754qxzic.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4418399/normal_5fe9646764367.pdfIn PDF document text
- https://cdn.sqhk.co/tegasipitif/hVZQAFc/multiplying_and_dividing_fractions_worksheets.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4450152/normal_60315f9415c70.pdfIn PDF document text
- https://cdn.sqhk.co/suvotoruwot/djc8hce/furasowesef.pdfIn PDF document text
- http://kejoxemubogese.mywebcommunity.org/vinufanamar.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4383804/normal_6042e0dbac17b.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4443809/normal_5fe25499af22d.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4370087/normal_5ffb0f3892798.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://temolujipu.myartsonline.com/carpentier_s_reconstructive_valve_surgery_download.pdfIn PDF document text
- http://tulifal.onlinewebshop.net/calinescu_five_faces_of_modernity.pdfIn PDF document text
- https://18e7ef82-5c75-44fe-ae22-4c356c2c9ce0.filesusr.com/ugd/749e61_254f30912d804e69890c8ec1a3afd3a3.pdf?index=trueIn PDF document text
- https://be934b08-0dcc-4e2e-8de1-c3c1c32dbfab.filesusr.com/ugd/d5415a_17dfeb73276a45548fbf272a0edb9c96.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_off0000e527.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE527	5832 bytes
SHA-256: `f0dfa36056e766cc3de3482699d681e1018bb3131826932cced91fd200c151c4`
`font_01_sfnt_off0000f8df.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF8DF	11740 bytes
SHA-256: `29fea7309602dae1d9ba30993e8ae50861cf52f20841a847caffa204085670b4`
`font_02_sfnt_off00011f0b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11F0B	4324 bytes
SHA-256: `a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f`

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