Malicious PDF — malware analysis report

Static analysis result for SHA-256 805ec2544243a277…

MALICIOUS

PDF

82.9 KB Created: 2021-02-06 19:11:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 12f1fdd0c6c77b945a672a56398fd341 SHA-1: 6460185bf6352c4876aa6732896fc8c077fb63ed SHA-256: 805ec2544243a277da256a4fef25c29394aa2d55a581e30b0527d38dbdb9a449
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 0.9997

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
  • 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://baarspo.ru/123?utm_term=spectrum+tv+mankato+channel+guide PDF link annotation
    • http://podarokinsta24.online/nasugorigudujawonavevotoel1b2.pdfIn PDF document text
    • http://criticcxck.space/7635507167z8jhl.pdfIn PDF document text
    • http://ridunculus.com/93072868858zwbce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451762/normal_6017a45471f4b.pdfIn PDF document text
    • https://zikotidule.weebly.com/uploads/1/3/4/6/134604350/kesiwanidulewep_wigawutese.pdfIn PDF document text
    • http://arevakar-travel.com/dosurifepogidulugatogetupthwlb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405413/normal_5fefbb7817c67.pdfIn PDF document text
    • https://lipojiwogim.weebly.com/uploads/1/3/0/7/130776075/2802668.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/hdQhbhg/wesivisukeduzarubuxukenob.pdfIn PDF document text
    • http://biribekagupelu.66ghz.com/30294355455.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499002/normal_5fcbf1d51c046.pdfIn PDF document text
    • http://hotita.space/xuzozesiwelunepimanakekulhim84.pdfIn PDF document text
    • https://cdn.sqhk.co/pakebisas/M8lggjh/shooting_games_for_xbox_one_with_gun.pdfIn PDF document text
    • https://vubilidupetox.weebly.com/uploads/1/3/0/9/130970012/xilij_vixeroziwe_dameperona_juvulokotovamod.pdfIn PDF document text
    • http://vquest.website/retailing_management_9th_editionphlt2.pdfIn PDF document text
    • http://vizabofunedaj.22web.org/actionable_information_en_francais.pdfIn PDF document text
    • http://comforfemj.fun/92457263151ujtb.pdfIn PDF document text
    • http://uber-global.com/donell_jones_torrenthkddf.pdfIn PDF document text
    • https://cdn.sqhk.co/salavogi/kqhiibO/castle_story_gameplay_2020.pdfIn PDF document text
    • http://artelamp.store/84291159573emctv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sajipesexadagon.epizy.com/information_of_fashion_designing_course_in_marathi.pdfIn PDF document text
    • http://tefinavi.epizy.com/affairscloud_paid.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_off000104fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104FA 5536 bytes
SHA-256: e660f031277d6308db862ad2d77ad622c9eb6558f0f8f6f4ef18848ea73c9538
font_01_sfnt_off000117ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117AB 11472 bytes
SHA-256: b74ad3e521f253524184a5a68084fa77e13472470c43af37c8d835e96c42e506

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