PDF malware analysis — malicious · 0e3f33ac9db665e6

MALICIOUS

PDF

81.9 KB Created: 2021-06-14 05:23:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14

MD5: e1c2a10893d6a80a418d914cbf7d0e40 SHA-1: 169a1febe938145f128bdf797b3b4eda0bf2b382 SHA-256: 0e3f33ac9db665e6081d04d6482f29fc628b7790a204f293f3b5f4736487a2d9

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by both a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The primary attack pattern involves embedding a large number of external links, many pointing to disposable hosting services, suggesting a link farm or SEO manipulation scheme. While no scripts were extracted, the PDF structure and numerous external URIs are indicative of a phishing or malware distribution lure.

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://archism.ru/pbw?utm_term=tiger+zinda+hai+worldfree4u PDF link annotation
- https://petominezejoza.weebly.com/uploads/1/3/2/3/132303337/8584407.pdfIn PDF document text
- https://bifurizikekoson.weebly.com/uploads/1/3/4/6/134690439/5390511.pdfIn PDF document text
- https://wenozujilemufo.weebly.com/uploads/1/3/4/4/134456287/libubu_gisade_vafifepoxize.pdfIn PDF document text
- https://rawewarox.weebly.com/uploads/1/3/1/3/131379085/23a3b57bd2.pdfIn PDF document text
- https://vazigawexike.weebly.com/uploads/1/3/1/6/131606690/735cef8c.pdfIn PDF document text
- https://nazewaraja.weebly.com/uploads/1/3/5/9/135959380/b650f74bbb.pdfIn PDF document text
- https://sekeratogo.weebly.com/uploads/1/3/4/6/134683690/roxerajad.pdfIn PDF document text
- https://pubixewamobuvu.weebly.com/uploads/1/3/7/5/137515712/vinuduponulatapaj.pdfIn PDF document text
- https://bazugibeb.weebly.com/uploads/1/3/1/4/131453150/b668b1ed17cd.pdfIn PDF document text
- https://sejubapis.weebly.com/uploads/1/3/4/8/134887951/juzavesavipej.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://fedorahosted.org/lohitIn PDF document text
- http://wojipag.pbworks.com/w/file/fetch/144421173/ms_dhoni_full_movie_download_in_tamil_hd.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d21422f5-c1f0-4939-8fd0-8aa3dd10087b/whitewash_look_on_pine.pdfIn PDF document text
- http://ronuzexem.pbworks.com/w/file/fetch/144621738/teduvepodisufodulud.pdfIn PDF document text
- http://dudatuj.pbworks.com/w/file/fetch/145267638/18757392534.pdfIn PDF document text
- http://larabefejaji.pbworks.com/w/file/fetch/144657003/kitab_al_adhkar_imam_nawawi.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5e0d5d66-5fb4-4244-9c12-2753d61ab5cf/843326787.pdfIn PDF document text
- http://patimedudemu.pbworks.com/w/file/fetch/144548262/sonic_mania_online_multiplayer_mod.pdfIn PDF document text
- http://topanekegeza.pbworks.com/f/gikugurejelipadopagix.pdfIn PDF document text
- http://nitezug.pbworks.com/f/download_amazon_prime_video_premium_mod_apk.pdfIn PDF document text
- http://vawijoj.pbworks.com/f/god_of_war_ppsspp_games_for_android_apk.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
- http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e025.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE025	5172 bytes
SHA-256: `777fd54a086376e0c3acb23af3426f7d1cd2c022857b63a78c8ef91042548dc2`
`font_01_sfnt_off0000f1d6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF1D6	3720 bytes
SHA-256: `d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280`
`font_02_sfnt_off0000fd39.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFD39	10736 bytes
SHA-256: `77fea79c5146096b6c5e2099f080f1ce47a10e81499fe67e267a352fa9429594`
`font_03_sfnt_off00012210.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12210	6912 bytes
SHA-256: `18fb58807c147a99e546a2cb393fa67cd8199b3622e222b6af068e3c9a12cec0`

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