Malicious PDF — malware analysis report

Static analysis result for SHA-256 099040619bf53de6…

MALICIOUS

PDF

69.8 KB Created: 2021-03-30 06:22:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: e5cf1497afcab2a5d4b3baebf63b7dd3 SHA-1: b01a1d95182b78b4808ceee9e5996254f7af515f SHA-256: 099040619bf53de68b8dcb6efd9124476a0ac4ab8917a3e0927c8751e9257f2e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, with a primary one pointing to a website that appears to be a lure for "sqribble ebook software reviews". The document's structure and embedded links suggest it's designed to redirect users to potentially harmful sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/wix?keyword=sqribble+ebook+software+reviews PDF link annotation
    • http://verifiedbadges-form.com/inspiring_life_story_of_successful_personhttxg.pdfIn PDF document text
    • http://japamawosoj.mygamesonline.org/kasisatajuzeletobajakaga.pdfIn PDF document text
    • https://vewiwuxipax.weebly.com/uploads/1/3/2/6/132681682/2481814.pdfIn PDF document text
    • http://dajitafelefusum.iblogger.org/asu_tempe_map_parking.pdfIn PDF document text
    • http://jekenufakewe.mypressonline.com/african_art_and_culture.pdfIn PDF document text
    • http://shimano-stradic.ru/pocket_watch_chain_goldxx0bb.pdfIn PDF document text
    • http://tixshopclub.fun/asbestos_roof_sheet_disposalbdgdr.pdfIn PDF document text
    • http://gemotebefid.22web.org/gangster_rio_game_apkpure.pdfIn PDF document text
    • https://kavusataru.weebly.com/uploads/1/3/5/3/135314949/xofufiri.pdfIn PDF document text
    • http://shopwithsale.website/romelaniximoridalisbe8.pdfIn PDF document text
    • http://fakixigulidol.mywebcommunity.org/2480155198.pdfIn PDF document text
    • http://igoscandinavia.com/58975894692zznv0.pdfIn PDF document text
    • https://mufogijagojar.weebly.com/uploads/1/3/1/0/131070489/44647.pdfIn PDF document text
    • http://retakajuzupix.22web.org/dfinition_de_l_accouchement_selon_l_oms.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gezujoju.epizy.com/kuvexiwofedifovasavasata.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/24645666462.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatofubote/varizinegoxawanebavez.pdfIn PDF document text
    • http://vugofixev.rf.gd/unifi_ap_ac_pro_setup_guide.pdfIn PDF document text
    • http://mifamin.epizy.com/famatarowodanozetofon.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/pmp_prep_book_rita_mulcahy.pdfIn PDF document text
    • http://wiwolobeduju.rf.gd/forms_and_functions_of_nouns.pdfIn PDF document text
    • http://gudanomakorake.epizy.com/40237109491.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_off0000d449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD449 5348 bytes
SHA-256: d2a6e4a9692bf906f009670d6f1f8d17125ea214655a2b8c58dc7ba28395a92e
font_01_sfnt_off0000e6a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A3 10420 bytes
SHA-256: db20a0ea3d4c451fc7282e99e8cff3ee722070ce044f771d0ad98f73e1fb7f8b

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