Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d610e96c3040485…

MALICIOUS

PDF

69.5 KB Created: 2021-04-05 19:07:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7a1d1b4b9dce998022e815dedd40b9c7 SHA-1: 9700266087a31fac5e5a0da67fdd36d575a5f521 SHA-256: 9d610e96c3040485d5a4914783c3f25f67a50a03a7ddf9aebfa7357a345f9ec6
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/123?utm_term=islcollective+spanish+answers PDF link annotation
    • http://katerevemoposab.iblogger.org/97586496065.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465149/normal_60166115d7b91.pdfIn PDF document text
    • http://lusuwivaw.medianewsonline.com/jurnal_hakikat_agama_islam.pdfIn PDF document text
    • http://budofibo.mygamesonline.org/xuxesuro.pdfIn PDF document text
    • http://pilefubasusuz.iblogger.org/extinct_birds_of_new_zealand_reading_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369912/normal_5fe7dd10705ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455907/normal_603102e8d1bfa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499636/normal_6036a4facd297.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453900/normal_5fc5acb8b1007.pdfIn PDF document text
    • http://mutujejeturuduf.medianewsonline.com/momegutevuzexodofavefas.pdfIn PDF document text
    • http://gagimubu.mywebcommunity.org/brachial_plexus_mri_protocol.pdfIn PDF document text
    • http://mangalvpodarok.ru/server_rack_rails_diyzy0zj.pdfIn PDF document text
    • http://deflecfcvy.best/lonadejujadezobokey6yhe.pdfIn PDF document text
    • http://dojemop.mywebcommunity.org/toxavetefewoguzoregibulu.pdfIn PDF document text
    • http://copyrightmediahelp.com/rules_of_chess_downloadpjson.pdfIn PDF document text
    • http://eroganoficial.site/usps_mdd_scanner_manualb4vii.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1c437d0a-cccb-4a8a-93f1-39e0b5126915.filesusr.com/ugd/b91566_19cec04d39294ebca77521fd5e74956f.pdf?index=trueIn PDF document text
    • https://be1b941d-c88c-475c-9260-a39c9d088d9d.filesusr.com/ugd/5c562d_a2989ecdf6404b73bbad29a804e4ee43.pdf?index=trueIn PDF document text
    • http://vodobugatusexa.epizy.com/bijakumogiremerator.pdfIn PDF document text
    • http://sulorowanutabu.atwebpages.com/boronizing_process.pdfIn PDF document text
    • http://kexasejuwodeji.epizy.com/businessworld_top_1000_corporations_in_the_philippines_2020.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_off0000d408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD408 5108 bytes
SHA-256: d5c2be4ed6d1b0419880651a5aa73782ec996080fe76200715f170c267526082
font_01_sfnt_off0000e578.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE578 10352 bytes
SHA-256: 1e28daf8d837fdc66eb2219c6e44e1644822d3e6ea06017d8a9f64808cd494e9

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