Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ab044b8a268a37e…

MALICIOUS

PDF

76.2 KB Created: 2021-03-31 20:30:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2a105a05e51d151275eb9d813465e4b0 SHA-1: 9112305380f9c056411417074bb433d556bce55b SHA-256: 8ab044b8a268a37ec1f659e517e7f6288eaf2d3d1b0d703de4371b40b0d4d601
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 0.9998

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 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://jumiwimov.ru/wix?keyword=a+handbook+on+english+literature+pdf PDF link annotation
    • https://cdn.sqhk.co/paxepedamaxa/cgeslhZ/explanation_text_year_4_worksheets.pdfIn PDF document text
    • https://cdn.sqhk.co/momujolo/ggspjau/29570739141.pdfIn PDF document text
    • http://nout-sale.site/tamazisaparadarete2u5h5.pdfIn PDF document text
    • https://cdn.sqhk.co/bitowiso/UUsrdgg/digiday_awards_logo.pdfIn PDF document text
    • http://logmeinnow.xyz/how_to_add_chart_in_rdlc_report4nxsx.pdfIn PDF document text
    • https://cdn.sqhk.co/zevinikiwi/h1dhjIK/36297802406.pdfIn PDF document text
    • https://cdn.sqhk.co/dugixikisim/jbib1hi/my_hero_academia_smash_tap_download_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/bupitagalir/Bijq7ij/70548557866.pdfIn PDF document text
    • https://cdn.sqhk.co/xufatirumina/Yjehagf/meena_game_download_for_pc.pdfIn PDF document text
    • http://bottlechainworld.com/what_hotel_the_shiningm884b.pdfIn PDF document text
    • http://migunovaj.iblogger.org/pikogunupigezigipupe.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusetoteji/jjigjd3/24111728830.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://runatavakez.epizy.com/50820244588.pdfIn PDF document text
    • http://poramukuwulaji.epizy.com/35888873643.pdfIn PDF document text
    • http://fosekor.epizy.com/kutuzetivetobu.pdfIn PDF document text
    • http://wezegene.rf.gd/aprendiz_de_bruja_witch_willow_gratis.pdfIn PDF document text
    • https://1b8131b1-2748-4b03-899c-43b53273a41f.filesusr.com/ugd/e3c460_2880cfc6c6da47158a3043ab31202741.pdf?index=trueIn PDF document text
    • https://d102a0f2-001f-4998-bb0a-88ac30ac05b5.filesusr.com/ugd/771ea4_9ce19c69879247d9bfcacbcd71fac9a6.pdf?index=trueIn PDF document text
    • http://josuguremim.epizy.com/citra_3ds_emulator_apk_mod.pdfIn PDF document text
    • http://muwalolerede.epizy.com/wiwezufane.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_off0000eac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC7 5496 bytes
SHA-256: eb2b703a671e1a45a4f5dea3f14ee8523dcbb04d07f024636875107e6f328900
font_01_sfnt_off0000fd69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD69 11136 bytes
SHA-256: 24007a90ce814b59962106b17f34cd6bb1db5bc42b5838d334ce6df422789bc9

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