PDF malware analysis — malicious · 6cbb35c050903360

MALICIOUS

PDF

136.3 KB Created: 2021-03-15 18:17:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10

MD5: d05a207bbc594bd597b2f4dbbd17e515 SHA-1: 59a3a1c901e5f9e4c5d0023b1b11223012611901 SHA-256: 6cbb35c050903360b4adb1bc63456100d82c16282ff3fb167635272b400ddfca

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains an embedded URI pointing to a suspicious domain, pelibifir.ru, which is likely used to host a phishing page or download a secondary payload. The document body, though heavily obfuscated, suggests a lure related to downloading a PDF, aligning with phishing tactics.

Machine Learning

Nyx PDF Classifier malicious score 0.9985

Heuristics 5

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 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/award?keyword=yajur+veda+malayalam+pdf+download PDF link annotation
- https://static.s123-cdn-static.com/uploads/4421335/normal_600798c493756.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4476011/normal_5fd3c9344097b.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4453719/normal_5ff7adbd55d54.pdfIn PDF document text
- http://marafonsport.site/71125094975jtrcr.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4471509/normal_5fea1ba802f5f.pdfIn PDF document text
- http://thrivewebs.com/wezerusoba3n9.pdfIn PDF document text
- https://cdn.sqhk.co/divojimo/xifihjc/persona_4_quiz_show_answers.pdfIn PDF document text
- http://chambrehub.xyz/police_car_coloring_pageshpgek.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4376088/normal_5fdb1560e59ac.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4426425/normal_5fe32021376aa.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4486045/normal_5fe1f76e2b448.pdfIn PDF document text
- https://cdn.sqhk.co/ludozenidi/ifPqpib/fun_guide_for_hago_play_with_new_friends.pdfIn PDF document text
- https://cdn.sqhk.co/rejiwosujupa/7wXidBB/there_s_only_one_you_song.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
- http://smc.org.inhttp://smc.org.inIn PDF document text
- http://fedorahosted.org/lohitIn PDF document text
- https://uploads.strikinglycdn.com/files/807d68d0-f08e-48e0-ac43-f7f25133e610/how_to_check_serial_number_of_laptop_in_ubuntu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3e0d5cc9-0f67-4b70-96fb-1efabdbe2e3d/what_are_the_rounds_in_cognizant_interview.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3dd5a71f-78b2-4685-ad24-9304436a49a8/how_much_to_replace_a_tankless_water_heater.pdfIn PDF document text
- http://dadojusox.epizy.com/79541191954.pdfIn PDF document text
- http://tisenunab.rf.gd/37332217436.pdfIn PDF document text
- http://jopubulebava.rf.gd/xurabavures.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
- https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00016e19.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16E19	5300 bytes
SHA-256: `4dc4aaceda5e087cf2aa737110893d678e7f1e241434d12149a16029c7024e4c`
`font_01_sfnt_off00018028.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x18028	33940 bytes
SHA-256: `2e616713eb738b278b3f731b1cf2e7749d5c9be039eba016e388ec0b095a87a4`
`font_02_sfnt_off0001dc40.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1DC40	12124 bytes
SHA-256: `8431cfd7c6407e973b613521042bda0bb30db30366acf16cb23e72dfd5f07873`
`font_03_sfnt_off000203e0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x203E0	3056 bytes
SHA-256: `b6b99d4cc48654262e186f613e61819397e12e1fff6642fa3df23f05c556295a`

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