Malicious PDF — malware analysis report

Static analysis result for SHA-256 7953e8e0a24dcd28…

MALICIOUS

PDF

91.6 KB Created: 2021-03-21 10:59:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e70ccfe3e4a9ec59c1d8a025bf4a2da9 SHA-1: b09587e9b1f55f07db58b82c26e708e736790e6d SHA-256: 7953e8e0a24dcd28cecc9ef91fa7361e9504ef79d304f4a9ec463b8454263cca
186 Risk Score

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jacksth.ru/wix?keyword=fallout+shelter+trophy+guide PDF link annotation
    • https://xiwupegolowiba.weebly.com/uploads/1/3/1/6/131606046/begonok-xawekikun-xikotizuzamosem.pdfIn PDF document text
    • https://cdn.sqhk.co/dagosasojo/0HNihjh/2nd_line_us_phone_number_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/libarazituw/idifgja/vokapagux.pdfIn PDF document text
    • https://cdn.sqhk.co/zupodejadofe/jhgfGgg/steam_halloween_sale_2020_games.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxuvedije/ge3heKH/46075331176.pdfIn PDF document text
    • https://cdn.sqhk.co/vugujebeku/fiaihhg/keyboard_for_seniors.pdfIn PDF document text
    • https://cdn.sqhk.co/kulobibab/iFjegeR/81436329552.pdfIn PDF document text
    • https://wamokanudetavud.weebly.com/uploads/1/3/4/5/134510572/7d89f0d88b03.pdfIn PDF document text
    • https://wisejagu.weebly.com/uploads/1/3/4/8/134881465/bofok.pdfIn PDF document text
    • https://cdn.sqhk.co/zejovedelali/slKheja/happy_balls_cream.pdfIn PDF document text
    • http://gegebafebofad.scienceontheweb.net/how_to_use_a_kitchenaid_microwave_convection_oven.pdfIn PDF document text
    • http://rumafelaneli.mygamesonline.org/puvudapesuja.pdfIn PDF document text
    • https://cdn.sqhk.co/xonizarisu/hic4jca/commuters_sans_github.pdfIn PDF document text
    • https://cdn.sqhk.co/vanatuwo/AfidHwS/musumawojuwixogibidu.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/mwBgjiL/social_media_downloader_ios_13.pdfIn PDF document text
    • https://cdn.sqhk.co/desogepupema/Qhhnha9/parow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://varirojemixu.myartsonline.com/89227799201.pdfIn PDF document text
    • http://gagolabirej.atwebpages.com/denuvobawulojamis.pdfIn PDF document text
    • http://lulevewutowa.epizy.com/jquery_ajax_form_submit_example_w3schools.pdfIn PDF document text
    • http://vofogidazok.epizy.com/riralowowadekerijibar.pdfIn PDF document text
    • http://xonowazibekaz.epizy.com/proposal_penelitian_akuntansi_sektor_publik.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_off000127cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127CF 5276 bytes
SHA-256: 96b71cc52e411d57554e34a2d4d52bca44e516daadd09b8f48b845b39fdaca36
font_01_sfnt_off000139c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139C6 11412 bytes
SHA-256: b7f508a2e543f33ab562b208f7d03036791d518119a0238b993ed93027f2211e

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