Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd793c7a0e387338…

MALICIOUS

PDF

75.4 KB Created: 2021-03-12 09:59:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 1e89833e82b3fc1a9e2d109969b7f484 SHA-1: c387c640679a00c86e38553ab69e056140f7c6eb SHA-256: fd793c7a0e3873381401374248f5f64e60cbb6f24674559a25c0e21d4b8a94c1
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely a phishing or trojan distribution attempt. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may be part of a multi-stage attack, potentially involving a password-protected archive.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://druttle.ru/wix?keyword=free+wildlife+ringtones+for+iphone PDF link annotation
    • http://ezfix.asia/babovarobefiwun72y8r.pdfIn PDF document text
    • http://mobufuwiwid.medianewsonline.com/how_to_calibrate_iproven_thermometer.pdfIn PDF document text
    • http://kushtanash.ru/438025580qgqx1.pdfIn PDF document text
    • http://filanion.online/fuzedakitoctmdi.pdfIn PDF document text
    • http://meetplafond.xyz/what_is_working_class_culture_uka1u7r.pdfIn PDF document text
    • http://kadaxejob.mypressonline.com/fender_mustang_gtx50_amp_list.pdfIn PDF document text
    • http://shopee24.site/calories_in_arbys_beef_and_cheddarwiw9q.pdfIn PDF document text
    • http://jivusibofonefud.mygamesonline.org/4348163956.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476432/normal_6023b986f13bb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387565/normal_5fed9bb3a1134.pdfIn PDF document text
    • http://anarchymedya.com/soccer_goalkeeper_weight_training_routinezf0c9.pdfIn PDF document text
    • http://wellwork.site/49174997027zqxqa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b67fa923-03b4-4d21-b555-95ff628d7525.filesusr.com/ugd/1d4b90_28e1c337366644bdae87579c815a4338.pdf?index=trueIn PDF document text
    • https://7b4e975e-109f-4397-a679-93e438ff1453.filesusr.com/ugd/c33f71_c89b1c65391347328487f3c7402a17d9.pdf?index=trueIn PDF document text
    • https://73099f28-10d5-4558-98a1-2f8dc61f1a2f.filesusr.com/ugd/f62eaa_9fcf065f9ae24f0a8a6768a6a0b93df5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/38aba84a-badb-4833-bef9-fca7a88d2d2d/46896892033.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cae9a66-e91a-4a7c-b2d2-4521839f3a1d/kavovopewimeg.pdfIn PDF document text
    • https://da550aaf-34ae-4f9b-ad82-7836b82beebe.filesusr.com/ugd/a203e6_60ea792cd67444ea96c16e9bc92624c5.pdf?index=trueIn PDF document text
    • http://tebaputazaxuva.myartsonline.com/all_full_forms_of_computer_subject.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34b60e4e-1dc3-449b-b331-eb20a3c01d37/jinodomotoj.pdfIn PDF document text
    • https://e61e9f85-32c5-4861-9fd4-b89109084c35.filesusr.com/ugd/2e4eb4_de9a2e507b584ab5ab17459017fef86e.pdf?index=trueIn 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_off0000eadf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADF 5140 bytes
SHA-256: 2a6cb1bfd545abb68976914954e8fcc96a9f802bb777176d72540571cd0472c7
font_01_sfnt_off0000fc71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC71 10568 bytes
SHA-256: cdac3e8a151ee036a1dfae0cbf28e47d88a6d352014c2b06f5d2bca9113d341a

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