PDF malware analysis — malicious · 15fe675729bc7437

MALICIOUS

PDF

69.5 KB Created: 2021-02-20 10:46:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15

MD5: 8f1c4fa9dd83327fcb2fc42f78fa923f SHA-1: db070e72998b1e2f0f21f4a562979ddbbf5b1ace SHA-256: 15fe675729bc743787e2bf6f36d9892fa63f98916848dd4f15ff1e48817d0290

194 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, indicating it is likely a phishing or malware delivery document. 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's content, though obfuscated, appears to be a lure for 'May 2017 sat qas pdf answers', aiming to trick users into downloading a payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 7

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://baarspo.ru/strik?utm_term=may+2017+sat+qas+pdf+answers PDF link annotation
- http://betmoy54.com/gifofukedujujuxe1xnel.pdfIn PDF document text
- https://basitonivi.weebly.com/uploads/1/3/4/5/134584834/7341701.pdfIn PDF document text
- https://joripipebepif.weebly.com/uploads/1/3/4/1/134131856/fejilorij.pdfIn PDF document text
- https://welavomuwaj.weebly.com/uploads/1/3/4/6/134633166/300ac2649986.pdfIn PDF document text
- https://sasanufodokedu.weebly.com/uploads/1/3/0/9/130969760/rumodolegu-polupiwewuberan.pdfIn PDF document text
- https://jetefodakulerur.weebly.com/uploads/1/3/1/4/131453332/344fc17c6b.pdfIn PDF document text
- https://xakowuval.weebly.com/uploads/1/3/5/3/135316831/8932363.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4465905/normal_5ff14953add0c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4481163/normal_602f7abe7aa53.pdfIn PDF document text
- https://lomofoxagut.weebly.com/uploads/1/3/4/5/134524577/bewog.pdfIn PDF document text
- https://fisujurij.weebly.com/uploads/1/3/1/4/131437504/polisomaxa_xidopifarepape_domaboxe.pdfIn PDF document text
- https://vigoxanumevu.weebly.com/uploads/1/3/4/4/134466257/799f999a8f2920.pdfIn PDF document text
- https://sivajusirev.weebly.com/uploads/1/3/0/8/130814673/7794048.pdfIn PDF document text
- https://labifunuvi.weebly.com/uploads/1/3/4/8/134847398/suvul.pdfIn PDF document text
- https://jemijibiwozigep.weebly.com/uploads/1/3/4/8/134855884/kimatebuwujidafosad.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4421630/normal_5fc7bad1a3fd5.pdfIn PDF document text
- https://mikotefi.weebly.com/uploads/1/3/2/6/132695671/7724009.pdfIn PDF document text
- https://laratenin.weebly.com/uploads/1/3/2/8/132816160/171d9ca43.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c168.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC168	2960 bytes
SHA-256: `ba9dd86ad06677ef82b9fc66565cbe1db364e5caa8fb73f24ce3e10b7ab9a08b`
`font_01_sfnt_off0000cbeb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCBEB	5732 bytes
SHA-256: `53bf998f0374e34b7007dabee3e4a82df5c25826ad73354117b8ad0cb5d814c6`
`font_02_sfnt_off0000dfb3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDFB3	11752 bytes
SHA-256: `ce290c6f31d1d8bac6f509236a433cb910bb250d751fdf58c87ced4b6ce9e36e`

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