Malicious PDF — malware analysis report

Static analysis result for SHA-256 adbb00f8cb3f8758…

MALICIOUS

PDF

115.1 KB Created: 2021-03-15 01:10:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 82a2388c16936f215ee7dee4e751c496 SHA-1: 52040ca01f00df98211098fb809589b471c5a98c SHA-256: adbb00f8cb3f875831a587bc0237dbb233e5e3681e656ff39a5b6f9f5222c066
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

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://mezovuduw.ru/strik?utm_term=is+frasier+still+on+cozi+tv PDF link annotation
    • https://cdn.sqhk.co/duvapegoleva/K8QMjbT/cross_wallpaper_iphone_8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382952/normal_603505bd9fca0.pdfIn PDF document text
    • https://cdn.sqhk.co/xemugugafot/Giiheif/the_wolf_online_simulator_gem_hack.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416493/normal_60180683ed05b.pdfIn PDF document text
    • http://paxezimusosesa.scienceontheweb.net/head_first_java_latest_edition_free_download.pdfIn PDF document text
    • http://wikowezenitezo.medianewsonline.com/why_is_my_irobot_blinking_red.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446400/normal_600181f76122e.pdfIn PDF document text
    • https://cdn.sqhk.co/ratusobuda/iegfjek/cdna_microarray.pdfIn PDF document text
    • https://cdn.sqhk.co/nogorodizet/ghgdjiT/18911734630.pdfIn PDF document text
    • https://cdn.sqhk.co/zokoxirinuz/4jeidgg/fire_wallpaper_hd_iphone_8_plus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409098/normal_603540ac6e28c.pdfIn PDF document text
    • http://all-casino.xyz/what_is_the_meaning_of_true_colors_song5l807.pdfIn PDF document text
    • http://craftsmansmetics.com/the_painted_bird_movie_downloadf6u1k.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/oAgjAih/85012947669.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463279/normal_601ae3ab63f65.pdfIn PDF document text
    • http://supobesopo.mygamesonline.org/tuvomamodepojol.pdfIn PDF document text
    • http://contact-git.top/why_to_read_autobiography_of_a_yogi9d27d.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/07188eae-1ed9-40e0-ba38-c86a5766320d/texukepefetujuzurorabo.pdfIn PDF document text
    • http://nejimafalun.onlinewebshop.net/zexukakosowanosivegi.pdfIn PDF document text
    • http://zitasixan.atwebpages.com/likepakikuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1c7000d-a59c-4b76-b74a-aa6f2364c7b2/wotaregolitojujidojinow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5aac6ca-7fe0-405d-b79d-6f0a90e3f40c/applied_bayesian_statistics.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.

FilenameKindSourceSize
font_00_sfnt_off00018598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18598 4924 bytes
SHA-256: e769b2f51d80d7677ffe5518f4ec49274ab978ca886b04d02357e5bb52a786af
font_01_sfnt_off00019674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19674 11928 bytes
SHA-256: 31ca1d3b1b45cc71d9b5a839e6f35fb601fa48b70ae2cf64c82d1dc924ce1b38

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