PDF malware analysis — malicious · a839a079cd561d98

MALICIOUS

PDF

72.8 KB Created: 2021-02-23 05:42:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10

MD5: 193931a795944623d273ce8d4a2930a7 SHA-1: ee11f79a595551bf8e5f9d6445b068a9fa524cc5 SHA-256: a839a079cd561d98b46ad65d450c09df88985801501e249ac867169595978ebe

136 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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
Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK

PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
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://druttle.ru/wix?keyword=neufert+pdf+srpski PDF link annotation
- https://cdn.sqhk.co/vujagefamig/8iihbge/wibizazunuk.pdfIn PDF document text
- https://cdn.sqhk.co/xederebat/aNifhgU/turn_off_data_roaming_iphone_8.pdfIn PDF document text
- https://cdn.sqhk.co/vabalogu/fDvXWjb/duweruwofaju.pdfIn PDF document text
- https://cdn.sqhk.co/zolilogifuxe/hdiaCL6/soralok.pdfIn PDF document text
- https://cdn.sqhk.co/linidivez/alvSIJ9/fall_toddler_boy_clothes.pdfIn PDF document text
- https://cdn.sqhk.co/nozelenid/eUlgiif/exoneration_synonym_french.pdfIn PDF document text
- https://cdn.sqhk.co/tememukafosu/A5Myhik/download__extreme_city_gt_car_stunts_mod.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4489586/normal_5fda5100a3bbe.pdfIn PDF document text
- https://cdn.sqhk.co/difigobon/ksjhib6/free_download_city_car_driving_simulator_game.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/wesezuzuvalirik/mobivifiwasi.pdfIn PDF document text
- https://s3.amazonaws.com/zomuzigo/12981712625.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_off0000e1ca.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE1CA	4828 bytes
SHA-256: `5e35f68bfbff727a16f2d2ba8908d84891a8d3d2b974517c153625e216021535`
`font_01_sfnt_off0000f256.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF256	10756 bytes
SHA-256: `ff8665850f601c5826d94a1e444884894f74bbfca56d8648668fbc39706d73b2`

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