PDF malware analysis — malicious · 4d1ba529715a3e5c

MALICIOUS

PDF

84.2 KB Created: 2021-03-24 11:41:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27

MD5: 7aa48289d484a6a649faa91ae3fd2803 SHA-1: 5ab65eb7a44eccd52f061ea08637ce84d2e4cfbb SHA-256: 4d1ba529715a3e5cdf06f55ada461a95510584fd437cf074df3c61900e559372

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to 'ap world history reading guide answers'. The presence of embedded URLs and the overall structure strongly indicate an attempt to direct users to potentially harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9994

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://kuzutuzo.ru/wix?keyword=ap+world+history+reading+guide+answers PDF link annotation
- https://risonozolediwar.weebly.com/uploads/1/3/1/3/131398017/kolebisijutimepa.pdfIn PDF document text
- https://nimekeboxiz.weebly.com/uploads/1/3/0/8/130873861/zisugatufenetetutoj.pdfIn PDF document text
- http://xuxuxib.iblogger.org/28657412510.pdfIn PDF document text
- http://apparentlyopt.com/25034400706cmrg9.pdfIn PDF document text
- https://mokakabatedi.weebly.com/uploads/1/3/5/3/135300589/wigexuzodopudizuvam.pdfIn PDF document text
- https://jedadizonavo.weebly.com/uploads/1/3/4/7/134721040/gubufajuzonebu_vikose.pdfIn PDF document text
- https://pedagojewixa.weebly.com/uploads/1/3/1/3/131398360/3318182.pdfIn PDF document text
- https://fumuteserem.weebly.com/uploads/1/3/5/3/135333711/rixojer.pdfIn PDF document text
- https://xitetufiwirisax.weebly.com/uploads/1/3/4/0/134041449/4300254.pdfIn PDF document text
- https://sukaxivex.weebly.com/uploads/1/3/4/8/134895869/tazizafanopukan.pdfIn PDF document text
- http://investmag.org/suzuki_quadrunner_250_2wd_carburetorz380h.pdfIn PDF document text
- http://nubokokepiw.iblogger.org/64922789888.pdfIn PDF document text
- https://sevisexabokiro.weebly.com/uploads/1/3/1/6/131637038/mamajisedijebug-futunu-susif.pdfIn PDF document text
- https://revelamedif.weebly.com/uploads/1/3/1/4/131437508/wumizejoxanib.pdfIn PDF document text
- http://fsbsiod.com/analise_financeira_de_balanos9ukhy.pdfIn PDF document text
- https://dovenokitumenu.weebly.com/uploads/1/3/1/4/131482991/6245159.pdfIn PDF document text
- https://lojavexir.weebly.com/uploads/1/3/5/9/135963097/4532736.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://tajiranolis.rf.gd/wajam.pdfIn PDF document text
- https://s3.amazonaws.com/pexodugosa/gixixulonawagexowuxukuzu.pdfIn PDF document text
- https://s3.amazonaws.com/vigevot/best_online_car_racing_games_for_android.pdfIn PDF document text
- https://s3.amazonaws.com/patilawasu/78518920907.pdfIn PDF document text
- https://s3.amazonaws.com/wupagivoz/sanixajoz.pdfIn PDF document text
- https://s3.amazonaws.com/juvetaso/ffxiv_armoire_guide.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00010bd9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10BD9	5404 bytes
SHA-256: `2c9d5371eaa9b306af20995b5edfe26f1d687fb854d3527eeed809c7c684378c`
`font_01_sfnt_off00011e47.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11E47	10984 bytes
SHA-256: `ac8073a246071f77dd81f7d4ebad3aeac4b7c2df2ce980ee3638096475f7d2b6`

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