Malicious PDF — malware analysis report

Static analysis result for SHA-256 612a0855262e800e…

MALICIOUS

PDF

84.2 KB Created: 2021-03-11 21:44:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 645406a6440374a0e28437e31fed163c SHA-1: 855d0fab51edd134a3916209a6273af8021004bb SHA-256: 612a0855262e800e7119fa0488d4348d4af0feb21adf2d2ecb554f8cb6428518
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 0.9992

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 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://midufefew.ru/award?keyword=materi+ipa+amdal+pdf PDF link annotation
    • https://jaxanotev.weebly.com/uploads/1/3/1/1/131164383/badoxurisakovo.pdfIn PDF document text
    • https://pilinasovoda.weebly.com/uploads/1/3/4/1/134132167/01b00a5c701a85.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/144b42a4-ede0-4e41-a845-eed2675ef7df/6171089949.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d15be38-2dab-4f64-99e4-412bf3f03b27/misurujazonukuriwesuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00fe9d64-474a-4255-b7d1-f970905ea253/ice_breaker_questions_for_work_during_quarantine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef7cdf5e-66e2-49fc-bf5a-7e7f94ca2b62/does_trx_help_lose_weight.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/936d5b34-4434-414d-91df-87c27eb36143/big_fish_and_begonia_full_movie_chinese.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/52242744194.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eed6865f-36ef-48ea-961d-d9b1809f6071/do_tv_writers_make_a_lot_of_money.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/parker_canyon_lake_arizona_fishing_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2ec162f-f570-4809-a2dc-ad42a607801b/the_ecology_of_human_development_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7376426-4a9d-42f4-b20d-1b7866e80aa7/aeschylus_eumenides_summary_sparknotes.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/pefokiwawilanezovojipuva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a61917d-b537-4bc1-8866-414ce7349f18/49285851287.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa6461b2-7b22-4f70-bec3-9fe40584c981/rotoziletemipaja.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/55524778961.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e81e7be8-ff46-451d-a223-afb747b8f57d/zefudifibogebup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dfb64bf-a16a-46fd-b577-ca028c62dbb4/vimomebekejodigoveli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f2ffa7a-8643-400d-9be5-6e296c5c5032/14780596777.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/image_blur_android_library.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51328e58-fca2-4dcb-9c12-b78283e960f0/ejemplos_de_cada_inteligencia_multiple.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ed9a694-2d48-4cd1-b541-68bc2483fdda/what_is_another_name_for_multiplication.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0a9a2ff-4c10-4753-90ee-383b187ab84c/who_invented_egyptian_mathematics.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_off00010e79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E79 5012 bytes
SHA-256: f133d31f34b6f16d77109b4d25d104aa011828528f169abcea97b605fc6bea29
font_01_sfnt_off00011f7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F7E 10420 bytes
SHA-256: b6de3c16e14365035867a4dffe1b336a8d64c0fa4d35ede0b49a6b903fe81412

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