Malicious PDF — malware analysis report

Static analysis result for SHA-256 9433fce29b5d188d…

MALICIOUS

PDF

81.1 KB Created: 2021-04-05 08:20:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b0ea394ae4e5d7a541abbb5427f12ccc SHA-1: fb54df7be5a6f57d6a19a23c5bb11a3015dda22e SHA-256: 9433fce29b5d188d5fe6d9c56988d3caacf730cc542240156969c7c8f54bb9c3
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://resalured.ru/award?keyword=plywood+boatbuilding+manual+pdf PDF link annotation
    • https://kemewekodu.weebly.com/uploads/1/3/1/8/131857474/d9c160e.pdfIn PDF document text
    • http://klossheff.xyz/auld_lang_syne_violin_sheet_musicrfv2w.pdfIn PDF document text
    • https://lefazevi.weebly.com/uploads/1/3/0/8/130873710/367d693f.pdfIn PDF document text
    • http://megazoni.iblogger.org/calming_piano_music_free.pdfIn PDF document text
    • http://vannabanyavsedela.xyz/fiturigat4lsgo.pdfIn PDF document text
    • http://betmoy57.com/maplestory_jett_link_skill_guidevez1o.pdfIn PDF document text
    • http://letnesil.xyz/addition_with_regrouping_worksheets_with_boxesnizqb.pdfIn PDF document text
    • http://kefojixesopu.66ghz.com/xozuzogulo.pdfIn PDF document text
    • https://koturukumofup.weebly.com/uploads/1/3/4/8/134883222/7251681.pdfIn PDF document text
    • http://smartradiobf.ru/what_is_selective_exposure_in_communicationcx6v8.pdfIn PDF document text
    • http://jewogipuwivi.medianewsonline.com/bullying_and_emotional_abuse_in_the_workplace.pdfIn PDF document text
    • http://kifegel.iblogger.org/convert_image_to_word_doc_online.pdfIn PDF document text
    • http://gudelew.mywebcommunity.org/66478103083.pdfIn PDF document text
    • https://latenenagizogip.weebly.com/uploads/1/3/2/6/132696064/pexibiguredev.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://magujale.rf.gd/55243444360.pdfIn PDF document text
    • http://xexobazetozi.epizy.com/mirugipu.pdfIn PDF document text
    • http://dabevejef.rf.gd/fifugitikupatafirena.pdfIn PDF document text
    • http://rigidafavubo.myartsonline.com/vonoxabesodapulowapep.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/57281385271.pdfIn PDF document text
    • http://pelewonaxiguso.epizy.com/how_to_know_if_computer_science_is_not_for_you.pdfIn PDF document text
    • http://pabotojixupi.atwebpages.com/brother_hl-5370dw_wireless_driver.pdfIn PDF document text
    • http://lugelugadafutes.rf.gd/coronary_circulation.pdfIn PDF document text
    • https://s3.amazonaws.com/nefunupu/nijimosuvem.pdfIn PDF document text
    • http://tidefos.epizy.com/63748180697.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_off000100a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A2 5424 bytes
SHA-256: 0b70e541d61c307f4101a42d4367aad3954009e1272ec2960725adeed7421990
font_01_sfnt_off00011320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11320 10464 bytes
SHA-256: 4d64a59a2829324251a376dea3ce042585bd9c0228808d6b2b522e4e0b35c194

Open this report in the interactive analyzer, or submit your own file for analysis.