Malicious PDF — malware analysis report

Static analysis result for SHA-256 8892c782164a7787…

MALICIOUS

PDF

83.7 KB Created: 2021-03-10 06:23:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f34de8bc16bea25a9027df6a0a33a4c SHA-1: 7b3ebd5d5023cc2cb26066ca33469856489612a3 SHA-256: 8892c782164a7787c2ee8dc8d07f13eb08e39604756beb41f8781bf250832a20
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file exhibits characteristics of an advance-fee scam, presenting lures related to lotteries or parcel deliveries to entice users. It contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier further support its malicious nature, indicating it likely serves as a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 8

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ponafet.ru/123?utm_term=color+code+in+excel+sheet
    • https://fejumarawa.weebly.com/uploads/1/3/4/6/134611790/jigelubigeweneki.pdf
    • http://ponopawux.iblogger.org/terminal_emulator_software_for_windows_10.pdf
    • http://kujunat.medianewsonline.com/how_to_connect_cardo_scala_rider.pdf
    • http://wulutapebime.getenjoyment.net/old_school_new_york_hip_hop_songs.pdf
    • https://disadoxamegipu.weebly.com/uploads/1/3/4/5/134527150/dizimojalos.pdf
    • http://gezudozu.iblogger.org/codingbat_answers_python_list_2.pdf
    • https://lubavezutumeji.weebly.com/uploads/1/3/4/7/134757539/be7fac2074ff.pdf
    • https://tabanaxil.weebly.com/uploads/1/3/1/8/131857193/1146895.pdf
    • https://kumobavubisu.weebly.com/uploads/1/3/0/7/130775432/d264042e830f5f4.pdf
    • http://dobomasinuraz.iblogger.org/cats_and_dogs_images.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://528f6e5c-6927-42ef-b7a5-a8f9c349750c.filesusr.com/ugd/07b979_b9a6a6a2f0fc454eb620e8882016fb14.pdf?index=true
    • http://lidizuderezoza.rf.gd/50592200093.pdf
    • https://8eefcaf3-52f5-4123-8be5-b1f0aaeea45e.filesusr.com/ugd/1d3654_5f6dc777dc924fd4b46b9fa560c539b2.pdf?index=true
    • http://zatajuvezutulo.rf.gd/lutomugewaziremaxukodebis.pdf
    • https://uploads.strikinglycdn.com/files/57e306a6-14d0-4fc5-b286-32205d7068c5/84733447265.pdf
    • https://uploads.strikinglycdn.com/files/14aa1c50-0aff-440a-8119-dbb316631c16/95208904647.pdf
    • https://45b0b119-5f8c-43e7-b437-4e12d17c1c81.filesusr.com/ugd/3826db_884ceb7cee0a42169417e68e0a052432.pdf?index=true
    • http://zesafemumibow.myartsonline.com/damituzerodekamaxo.pdf
    • https://84d51d8d-5932-465a-b044-5d36dace581c.filesusr.com/ugd/98e2de_824af4059cd74a5a8266f59cd73c4eda.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1501c5f8-4e99-4d00-acdb-42bc221c2a6a/48697711147.pdf
    • https://f6180879-d31b-499c-8e42-fead7842c491.filesusr.com/ugd/007227_41e510e9f5e94cefaac48f70e0f2f7ef.pdf?index=true
    • https://55d63786-14d6-44de-84d0-33f1fb383c44.filesusr.com/ugd/45fd81_4897177b9fdb487c92cab785abbfe9ee.pdf?index=true
    • https://uploads.strikinglycdn.com/files/84e2b48f-73bb-403b-b14c-0903f05c12de/robin_williams_the_non-designers_design_book.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9a4.bin
7766d4fb03035fdce665fe78b777169cb013e60e0cf3b459f5d10127bd3333be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A4 4792 bytes
font_01_sfnt_off0000f9de.bin
573f82ffaaf7a72c7d751209e02e826ab3c8d0477432415368384add4efc2ee9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DE 2156 bytes
font_02_sfnt_off000103de.bin
ed70aceca606ec8fb1145ca9acd03b641d7a92b8fba5ab050e54b3478c0bb228		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103DE 11152 bytes
font_03_sfnt_off00012a01.bin
86f0cdb313824039da90733caace7ac13388a7bc5b61c62ee1289ca2c886f6f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A01 16492 bytes

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