Malicious PDF — malware analysis report

Static analysis result for SHA-256 241c0455e0419c28…

MALICIOUS

PDF

86.1 KB Created: 2021-03-11 00:16:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 2862b9be9dbd6939c086b98fd601f76e SHA-1: 0949e38b26300715fe054d97a2b6a817f175678b SHA-256: 241c0455e0419c2845f618a517f7c4dfefc68fc4e880d904d926c15b15a6d530
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 0.9992

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://maypoin.ru/123?utm_term=angular+5+nested+formgroup PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409811/normal_6035bf9f9e607.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388173/normal_5fcd854e163ef.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/bajamafat.pdfIn PDF document text
    • http://itfamily.pro/smithsonian_journeys_tour_reviewsqnxea.pdfIn PDF document text
    • https://cdn.sqhk.co/pugudanirav/giI3Vib/gunavunajepob.pdfIn PDF document text
    • http://nosumiva.mywebcommunity.org/standoff_movie_cast.pdfIn PDF document text
    • https://buzotenugi.weebly.com/uploads/1/3/1/4/131408099/7178138.pdfIn PDF document text
    • http://pogadai.xyz/ressentimento_maria_rita_kehlv7tqk.pdfIn PDF document text
    • https://cdn.sqhk.co/libavesonon/ijaiahe/bedewetero.pdfIn PDF document text
    • https://cdn.sqhk.co/kitaparek/hbLQhil/27614079666.pdfIn PDF document text
    • https://cdn.sqhk.co/lekibefefu/jyF6rgi/mansions_of_madness_recurring_nightmares_buy.pdfIn PDF document text
    • http://fb-copyright-help-from.com/letter_of_intent_sample_psychology_graduate_schoolhywd0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469104/normal_5fce5ae3218cd.pdfIn PDF document text
    • http://nafewid.sportsontheweb.net/distributed_systems_principles_and_paradigms_2nd_edition_free_download.pdfIn PDF document text
    • https://mexukisigugat.weebly.com/uploads/1/3/4/7/134702857/8116606.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389106/normal_5fed72d8c360a.pdfIn PDF document text
    • https://vebuxevofarina.weebly.com/uploads/1/3/4/0/134013543/verere_xugita_zokileni_wigefir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465131/normal_5fd7d23cd4e9e.pdfIn PDF document text
    • https://cdn.sqhk.co/pefisemise/ajegipg/real_bike_racing_3d_apk.pdfIn PDF document text
    • https://totidulabi.weebly.com/uploads/1/3/1/6/131606487/jalesuvudisemuvowobe.pdfIn PDF document text
    • http://nefritthebestthing.site/htc_scribble_onlinequndq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nixomirorubu.myartsonline.com/lagexokofofenidovapegulo.pdfIn PDF document text
    • http://molagegivijoxu.onlinewebshop.net/how_to_use_mr_coffee_dehydrator.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_off00011080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11080 5476 bytes
SHA-256: 7f41e64cbd0e28c7d391eda028bcd690f038cf3715b921fdc075ee285f5c1d01
font_01_sfnt_off00012311.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12311 11628 bytes
SHA-256: 0ae8196b777af38ea0e1e3bc8a2b2cfa523d6ed4d3e0fa4a02d857e14a2266fb

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