Malicious PDF — malware analysis report

Static analysis result for SHA-256 88f3175838308b46…

MALICIOUS

PDF

85.8 KB Created: 2021-02-16 08:12:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 60a9eeb9d4310c75a80117d5482223af SHA-1: 42269dd2ca4e968c15467bdbdf8aee47fd4d2801 SHA-256: 88f3175838308b46fa9f16404437c496d514e921a09bc2772c72015db260c12d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains multiple embedded URLs, many of which are part of a link farm hosted on disposable domains, indicating a phishing or malicious download attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were extracted, the presence of numerous obfuscated links points to a phishing lure designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/strik?utm_term=trading+beyond+the+matrix+download PDF link annotation
    • https://cdn.sqhk.co/xororofomed/jhjj2jg/61039247943.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368956/normal_5fce288d53ae4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464068/normal_601c85f31c5c1.pdfIn PDF document text
    • https://cdn.sqhk.co/zururodi/egfjaOo/high_quality_mp3_voice_recorder_iphone.pdfIn PDF document text
    • http://jirafka.space/admob_ad_size_in_android7zz2f.pdfIn PDF document text
    • http://netzamka.ru/ladadazixorintus7m.pdfIn PDF document text
    • http://podarokinsta.site/another_weird_platformer_20169n9om.pdfIn PDF document text
    • https://cdn.sqhk.co/wukufazujuv/pib6lqX/best_kung_fu_fight_video_download.pdfIn PDF document text
    • https://cdn.sqhk.co/nobixapo/ddhjiig/splash_lagoon_winter_hours.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447450/normal_60013cf236f92.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406782/normal_5ff559c2ac5c8.pdfIn PDF document text
    • https://cdn.sqhk.co/kululojilo/ujggdb3/zutefesaxesitajofikubok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481069/normal_602936ca926dc.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
    • http://tinanatibora.rf.gd/lobenogifiziwiba.pdfIn PDF document text
    • http://ruxurosagogaru.epizy.com/23660309473.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f89c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF89C 5200 bytes
SHA-256: bfedbb63431d2b980e57dc91542041a3666709059b66e68249a1aff3d3a347ee
font_01_sfnt_off00010a2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A2C 3720 bytes
SHA-256: d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280
font_02_sfnt_off0001158f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1158F 11080 bytes
SHA-256: f65eb40c3af0f9ab165dc9a424e2b22c89ca718ebe54928bb127bd042b43a360
font_03_sfnt_off00013b6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B6B 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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