Malicious PDF — malware analysis report

Static analysis result for SHA-256 d30aa12a9ebaef11…

MALICIOUS

PDF

83.5 KB Created: 2021-04-05 09:12:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d70501dc42f2c9ef0efdabd1f51dda53 SHA-1: 905ebe07d9e341ce7d0e77ad75eb4d3e82ede412 SHA-256: d30aa12a9ebaef119a87a2c536da91666cea9cb84dab4d3659eccc02eb643057
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9995

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 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.
  • 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/123?utm_term=bus+games+free++full+version+pc PDF link annotation
    • https://sidugavumudoriz.weebly.com/uploads/1/3/4/9/134902227/b0678fd.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/xhjkfSo/farm_bill_2020_upsc.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/ThfFShf/bloons_td_6_unlimited_monkey_money_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/filovixedalu/djejiYg/nintendo_switch_lite_tips_and_tricks.pdfIn PDF document text
    • https://wakukaxowemaba.weebly.com/uploads/1/3/5/3/135303752/65d644e9eb4d095.pdfIn PDF document text
    • https://nogikukejigili.weebly.com/uploads/1/3/0/8/130873965/5cf7780c35909.pdfIn PDF document text
    • https://lelopotive.weebly.com/uploads/1/3/0/7/130738546/jesaxora.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://ab0007c4-58ca-4db2-ab23-686bae4d53c1.filesusr.com/ugd/8bf248_e2a5c0b52ccb46bb8c80f5ef973a9cd8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/palevijuj/73695187837.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/japilovuxuwasuzomezagot.pdfIn PDF document text
    • https://8ac5c8e1-9174-427d-95c2-90bebb9f105a.filesusr.com/ugd/44b221_9e5e51cebc0746adbfa1e1486e1bf4a0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/black_fluted_plastic_sheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dba3318f-1c48-46a7-8806-c7fb2a95ec4b/kimoliluxurudefolaronutaf.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/somewhere_over_the_rainbow_israel_lyrics_and_chords.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/530af5b7-850c-472c-ac40-5104939eb985/kiss_the_rain_music_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ca4a6c7-9833-46bd-a55b-259687a908b1/zosas.pdfIn PDF document text
    • https://a1f0096d-76f5-425c-b826-5ccbd312c1bc.filesusr.com/ugd/8f8c07_5a25ea6bff8b418894af586729b344f5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/rider_waite_tarot_book_depository.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/maschine_mikro_2_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a77bad5d-9918-4339-a29f-d7e91aa05b52/7472299834.pdfIn PDF document text
    • https://5a6df620-610b-4d6f-8f1b-71e936bb70bc.filesusr.com/ugd/1f5cef_a908591c6bd24eb7942d33671a659393.pdf?index=trueIn PDF document text
    • https://d0fd53c2-66a5-49f7-a942-a4bfc50892a3.filesusr.com/ugd/11baf9_8a20099746cd41e2b7abbd1efd02a9bb.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA09 5248 bytes
SHA-256: e9b541c630839ab81f91879534605fe89865c8d8e6f3fb77d8973b2fcbdc4a90
font_01_sfnt_off00010bd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD3 11100 bytes
SHA-256: 90bd239a276b54605080a4dc4a392cd1f43080a5faf5b794d93fbf913aff7943
font_02_sfnt_off000131d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131D5 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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