Malicious PDF — malware analysis report

Static analysis result for SHA-256 be0223d9129cf416…

MALICIOUS

PDF

77.5 KB Created: 2021-03-30 20:23:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fea6d95d1c7cb02a47e11a311a57e7be SHA-1: 9e4fb44a04047a94d74d6a5c2c650b10c5a90e51 SHA-256: be0223d9129cf416f895c80f80452a414c858f8551fcd0bad816aeae916d2fc3
126 Risk Score

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 0.9991

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://nipisod.ru/123?utm_term=definition+of+detailed+project+report PDF link annotation
    • http://govugododuwo.iblogger.org/bivariate_distribution.pdfIn PDF document text
    • http://creditscorehelp.info/qu_es_la_enfermedad_de_kawasaki_en_los_niosjxbyd.pdfIn PDF document text
    • http://xtreme-sport.ru/95438279879ycbx2.pdfIn PDF document text
    • http://astropsychology.site/rerexogepakubiloxaxavhs4e3.pdfIn PDF document text
    • http://xunarepozufuz.mygamesonline.org/tratamento_anaplasmose_canina.pdfIn PDF document text
    • http://biwiroxefamir.mywebcommunity.org/mcculloch_pro_mac_610_user_manual.pdfIn PDF document text
    • http://zipujesilan.22web.org/34321146796.pdfIn PDF document text
    • https://cdn.sqhk.co/lajojeletab/hgSib4i/snake_year_2020_feng_shui.pdfIn PDF document text
    • http://medyayazilimtr.com/38525257465mqtlz.pdfIn PDF document text
    • http://fruitik.space/o365_mfa_deployment_guideqchna.pdfIn PDF document text
    • http://lemakomude.sportsontheweb.net/37608748552.pdfIn PDF document text
    • https://cdn.sqhk.co/rutisifelom/Pihajjj/filotari.pdfIn PDF document text
    • http://jonavaruxeri.22web.org/car_loan_agreement_template.pdfIn PDF document text
    • https://cdn.sqhk.co/sitopizol/jhfgiha/street_racing_dallas_tx.pdfIn PDF document text
    • http://mijipuva.iblogger.org/54468294777.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gozuketitara.onlinewebshop.net/51074677048.pdfIn PDF document text
    • https://7133fc40-0b9c-4701-b953-e7fafc934b44.filesusr.com/ugd/70a38d_c13258a581684489a4e2792a4d6d7e03.pdf?index=trueIn PDF document text
    • https://e26dc784-fa46-4601-9f6d-57686faaf216.filesusr.com/ugd/c66525_7c1afbb4d9b74782beeedac8b5f78139.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gozilum/gyprock_wall_sheet_sizes.pdfIn PDF document text
    • https://d5aacb37-8766-4234-9cc8-c2ec3b911aba.filesusr.com/ugd/1e723b_ea0852257ece47b0a174af10b91dddd9.pdf?index=trueIn PDF document text
    • https://02e0da19-eac5-4521-950b-4e410541bf1c.filesusr.com/ugd/516249_0688b4b7bdb34f3698c518bd89a48935.pdf?index=trueIn PDF document text
    • http://bodudenijijeb.onlinewebshop.net/pediatric_cardiology_mcqs.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/7059342967.pdfIn PDF document text
    • https://s3.amazonaws.com/nojemi/938086204.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_off0000f0b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B0 5048 bytes
SHA-256: c77f5449469a27bff1f2d928699306b3546f56b1e6fcf9cd7d84026609973b05
font_01_sfnt_off000101f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F9 11684 bytes
SHA-256: 9d8340ac17b139c283fb35a943cafe98452952e6dfe4f8a08b7cfc2a24e4d03d

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