PDF malware analysis — malicious · a057a198259aa4d4

MALICIOUS

PDF

81.5 KB Created: 2021-02-17 21:06:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26

MD5: e8591bae56ced1233a0f12831e7eb101 SHA-1: 5795a0994e997ae3d52b35245e6900792a100182 SHA-256: a057a198259aa4d46d13f91b810cd829b9decc349592273ffdc63ae7a88b0a32

186 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 high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The document body, though heavily obfuscated, appears to reference software registration keys, a common lure for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/123?utm_term=foxit+pdf+editor+registration+key PDF link annotation
- https://tivaxuxilo.weebly.com/uploads/1/3/4/1/134131375/gixufukonivadapetag.pdfIn PDF document text
- http://ru-payment.casa/zobimakakugidatamopevefs8c.pdfIn PDF document text
- http://naturfresh.fun/bupugulovogogazefujlp15.pdfIn PDF document text
- http://gbarb.me/honda_motorcycle_parts_list_australia1tyje.pdfIn PDF document text
- https://nesexije.weebly.com/uploads/1/3/1/6/131607346/zufupekolo.pdfIn PDF document text
- http://tiktoktop.design/administrao_de_marketing_philip_kotler_livrosfk5v6.pdfIn PDF document text
- https://fiwimojulo.weebly.com/uploads/1/3/4/5/134525916/sofizovemixas_watumajulinir.pdfIn PDF document text
- https://cdn.sqhk.co/wukiratuxazo/5Yij4ge/list_of_race_car_drivers_killed_in_australia.pdfIn PDF document text
- https://vorapitejure.weebly.com/uploads/1/3/4/6/134605364/bcfc8f.pdfIn PDF document text
- https://fanawilixu.weebly.com/uploads/1/3/1/4/131408209/lasebime-xoras.pdfIn PDF document text
- https://mazanotofubemiz.weebly.com/uploads/1/3/2/6/132681192/2559072.pdfIn PDF document text
- https://foxenaduro.weebly.com/uploads/1/3/1/1/131164157/butivexa_seketisowamon.pdfIn PDF document text
- https://cdn.sqhk.co/pixafosabow/hiwtjfX/podium_racing_wheel_f1_pc.pdfIn PDF document text
- https://cdn.sqhk.co/zodunoxurob/bii7hgP/bidasanixa.pdfIn PDF document text
- https://cdn.sqhk.co/nilofixogezu/W50gjI5/48853594453.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
- https://s3.amazonaws.com/dosalapasenow/vepazunitu.pdfIn PDF document text
- https://s3.amazonaws.com/wetevali/sonogexalose.pdfIn PDF document text
- https://s3.amazonaws.com/kosamupim/kirchhoff_s_law_worksheet_with_answers.pdfIn PDF document text
- https://s3.amazonaws.com/voxipanovigepiv/imdb_parents_guide_terminator_3.pdfIn PDF document text
- https://s3.amazonaws.com/defujo/aimer_refrain_ga_sakenderu.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f187.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF187	5156 bytes
SHA-256: `78ce6c8de2a6fbbbe9a9275c384a4d53d7dc0978ef2f89677a0969ae0126823d`
`font_01_sfnt_off00010334.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10334	12008 bytes
SHA-256: `d38962427d2bea3b0dd13fb94f8152910e0120f670d89064feb20b954149b869`
`font_02_sfnt_off00012a73.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12A73	4324 bytes
SHA-256: `1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e`

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