Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c8e6c57595bf9ad…

MALICIOUS

PDF

79.2 KB Created: 2021-05-03 07:09:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 30f61282483bbd06b3a523e2f5d215fe SHA-1: b7b1411cde582c7c760941038cade8212ad1d4d4 SHA-256: 0c8e6c57595bf9ad8acb4bd0b778d561b1964c329902477721b02a760455b287
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://zajinet.ru/strik?utm_term=idioms+2+worksheet+answers PDF link annotation
    • https://cdn.sqhk.co/jukunobegabe/hbajagf/nizokidur.pdfIn PDF document text
    • https://cdn.sqhk.co/futevanu/dvAGjbi/bikers_hangout_wsj_crossword.pdfIn PDF document text
    • https://cdn.sqhk.co/didatife/HjgQhjg/11464087112.pdfIn PDF document text
    • http://world-wild-shop.com/saxomakoxikesikuguz9kjau.pdfIn PDF document text
    • https://cdn.sqhk.co/mafozerekat/7XhfsnZ/17578758252.pdfIn PDF document text
    • https://cdn.sqhk.co/xurakipigub/cwhh6Hk/92429891292.pdfIn PDF document text
    • https://cdn.sqhk.co/loberutebe/ghi7idm/zombie_chasers_short_summary.pdfIn PDF document text
    • http://tihefers.online/ipads_in_the_primary_classroomq7825.pdfIn PDF document text
    • http://murezisafedamaw.22web.org/free_audacity_with_crack.pdfIn PDF document text
    • https://cdn.sqhk.co/dekaroku/ieibChf/fozefuvelowibojulodujibam.pdfIn PDF document text
    • http://xuzerujagojagip.scienceontheweb.net/tutorial_carding_android.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d51c5da-7e6c-474f-a3de-371a82d91463/vamugotodi.pdfIn PDF document text
    • http://badiwoxot.rf.gd/37369865297.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cda40a0-618a-47fc-86a5-da2f7d7a4a16/motorola_g6_plus_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d3af00d-63e4-48a7-a71b-c2a96faf2bd6/fukipuboxujavobufusuzoxe.pdfIn PDF document text
    • http://tobisijukufoki.epizy.com/fundamentals_of_english_grammar_5th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cf49f08-88ad-435f-a276-db8038d4c74f/mesakisogigafik.pdfIn PDF document text
    • http://sokekakeloji.onlinewebshop.net/13575619347.pdfIn PDF document text
    • http://wepikupovug.myartsonline.com/lelel.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF831 5256 bytes
SHA-256: ca78f665f7413c329356e4fd172969cb968536f6e72080aee9c95e42a59c413b
font_01_sfnt_off000109f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F7 10972 bytes
SHA-256: d0f470a1b6a034b4bc24a1af0d49bbdca8abc2c36353b4f4dccc9a26115601bf

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