Malicious PDF — malware analysis report

Static analysis result for SHA-256 73697076bceb5a69…

MALICIOUS

PDF

81.3 KB Created: 2021-05-02 12:22:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8e8c087f709f8c6a35a5ab42e5e04d06 SHA-1: 1afce44c09cbf76cac759d454d45c65b8c60aee4 SHA-256: 73697076bceb5a690d77e54580ec1aa81e4d4005a62d1e1bcc39d3389ee4c32e
166 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 0.9996

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://xajibur.ru/strik?utm_term=how+to+create+an+ecommerce+website+with+wordpress PDF link annotation
    • http://lobabinuladeri.medianewsonline.com/naligibarubuvopatejilim.pdfIn PDF document text
    • http://dunotap.iblogger.org/gudoguxe.pdfIn PDF document text
    • http://lavorunolutoga.22web.org/snake_pass_pc_game_free.pdfIn PDF document text
    • http://circulyarkadigital.xyz/sukurosonerazipawam2yo2o.pdfIn PDF document text
    • https://xevibobi.weebly.com/uploads/1/3/4/6/134683071/bunumedagik-jirufa-rumezeb.pdfIn PDF document text
    • http://markettop.pro/jegalifofoya9xa.pdfIn PDF document text
    • https://cdn.sqhk.co/kubabulukod/uH1hfhe/ecers_r_score_sheet.pdfIn PDF document text
    • https://bowutemol.weebly.com/uploads/1/3/4/2/134234741/madamariseg.pdfIn PDF document text
    • https://nogikukejigili.weebly.com/uploads/1/3/0/8/130873965/zewixiw.pdfIn PDF document text
    • http://sovadarasuzepa.iblogger.org/jejatos.pdfIn PDF document text
    • https://cdn.sqhk.co/kajutizikodu/jjhj9hc/leletofotu.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/seth_material_youtube.pdfIn PDF document text
    • http://privateguardingserviceagainstdanger.site/36011006776jxx0g.pdfIn PDF document text
    • http://gloslides.com/busaxuxowo94hox.pdfIn PDF document text
    • https://vekekugez.weebly.com/uploads/1/3/4/8/134883785/6299083.pdfIn PDF document text
    • https://gozaxuvo.weebly.com/uploads/1/3/4/6/134612917/josenuz.pdfIn PDF document text
    • https://cdn.sqhk.co/muluxodipoto/dhgjdGC/92905836189.pdfIn PDF document text
    • http://mihetos.xyz/27114549538sylnf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://wadoromutisagar.myartsonline.com/46452863114.pdfIn PDF document text
    • http://duwopatovulid.rf.gd/68628076755.pdfIn PDF document text
    • http://jafixomedimun.onlinewebshop.net/cbse_sample_paper_2020_class_10_download.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D1 5264 bytes
SHA-256: 26f2227d533ac1a419e6adb4540db37818cd69c35a9aebf5459c98909e6383ec
font_01_sfnt_off00010681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10681 10040 bytes
SHA-256: 44d6b132b9363da2bdb56b9834241b97007a2ed5242d0963eb8a6e3452bed73b
font_02_sfnt_off000128fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128FC 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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