PDF malware analysis — malicious · b3dbc5ef1d4bbbb2

MALICIOUS

PDF

78.4 KB Created: 2021-05-17 20:45:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24

MD5: 6020ac12f4e377ec5ac2504da982ccef SHA-1: e7b53507155c68460dda2461499d8451b33a0ab1 SHA-256: b3dbc5ef1d4bbbb2cac11a3de45dd838a502a18efdb4e043efd370772a104455

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan-like behavior. It contains embedded URLs, with one prominent URL pointing to a suspicious domain that appears to be part of a link farm designed to redirect users. The document body, though heavily obfuscated, contains keywords related to furnace ignitors, suggesting a lure to a malicious site.

Machine Learning

Nyx PDF Classifier malicious score 0.9961

Heuristics 5

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 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://jottigo.ru/strik?utm_term=bryant+gas+furnace+hot+surface+ignitor PDF link annotation
- http://businessoutsourcing.org/628381949459yq2l.pdfIn PDF document text
- https://cdn.sqhk.co/gapekozuwa/vnFcLhd/nickelodeon_super_brawl_universe_best_characters.pdfIn PDF document text
- http://helplnstagramcontact6088756.com/fagles_iliad_kindle390k1.pdfIn PDF document text
- http://carluxepaint.site/184489371589sc7.pdfIn PDF document text
- http://tb-films.ru/dometic_not_cooling_on_gaswhkr2.pdfIn PDF document text
- http://vasizazesunof.medianewsonline.com/12656998026.pdfIn PDF document text
- https://cdn.sqhk.co/verexumifo/QCbOXig/xedovupejoro.pdfIn PDF document text
- https://cdn.sqhk.co/lekusovu/giatjjy/blackplayer_ex_music_player_apk_20._50.pdfIn PDF document text
- https://cdn.sqhk.co/liramesot/RY67LFc/26451102107.pdfIn PDF document text
- http://jibakerutev.mypressonline.com/spring_batch_tutorial_download.pdfIn PDF document text
- http://muxoman.mygamesonline.org/befidolopebevetilexovun.pdfIn PDF document text
- https://cdn.sqhk.co/kulobibab/QFhbqRy/joresamiwopudiwimusujelir.pdfIn PDF document text
- http://my-favshoph.online/godirakifujbe87.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://nejimafalun.onlinewebshop.net/what_is_nation_news.pdfIn PDF document text
- https://s3.amazonaws.com/furunumaroxun/the_green_mile_movie_director.pdfIn PDF document text
- https://790985df-dfec-4a08-b509-00f37668cf87.filesusr.com/ugd/a421e3_51f202c35df64297b014652012e92898.pdf?index=trueIn PDF document text
- http://xuvekixofeku.onlinewebshop.net/24542280850.pdfIn PDF document text
- http://jabodegodonirad.atwebpages.com/meade_autostar_494.pdfIn PDF document text
- https://s3.amazonaws.com/tupofelasujewas/57338176055.pdfIn PDF document text
- https://s3.amazonaws.com/toguvaju/vaaste_song_mp4_pagalworld.pdfIn PDF document text
- https://s3.amazonaws.com/fixararololu/dying_light_strategy_guide.pdfIn PDF document text
- https://97e6e6c8-040d-427c-ad66-6ef02350ae38.filesusr.com/ugd/9c523c_c6e29b4407a74b59802a1bcf294912e9.pdf?index=trueIn PDF document text
- https://09af0a6c-c0e6-47ff-90c1-5b173435ccd1.filesusr.com/ugd/b92b66_fae7dff7d390468d88235ac28a59b93a.pdf?index=trueIn PDF document text
- http://gubawakelu.onlinewebshop.net/aladdin_disney_story.pdfIn PDF document text
- https://8f1c0ae7-1ba6-4c51-a623-4d29f5e3aebb.filesusr.com/ugd/c1615c_b6a98a4325674c57abc073744600dd02.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/bezorito/73413670879.pdfIn PDF document text
- https://40fd9d30-e691-4ad4-9ff9-7de67b304886.filesusr.com/ugd/45b27a_bf1013dd2d9845b4973e56cb6f117143.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f47e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF47E	5264 bytes
SHA-256: `965ae156792b317fad7cb12549c89e3a496eec2f0b51702566b3567475e1056b`
`font_01_sfnt_off00010673.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10673	10912 bytes
SHA-256: `b5849eb86b1128a2cd974e3d3b1f292a104b1bf6800b1ed3ef09d31caa8436ec`

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