Malicious PDF — malware analysis report

Static analysis result for SHA-256 eda9def079c444f4…

MALICIOUS

PDF

73.3 KB Created: 2021-06-06 07:30:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 449f637ca799f8cd713e3ee5749d5a5e SHA-1: ef3511ee3fa7614d946b44db8567c26169488ad8 SHA-256: eda9def079c444f4e87abdb6837b87e6698626f975f5520d71202bad3cb73eeb
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

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://ketchas.ru/pbw?utm_term=nuclear+bomb+sound+effect+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4423195/normal_6058cc424ce77.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370267/normal_5fe0ee509ff76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418796/normal_603b4122ee937.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485012/normal_6043889935dad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498978/normal_5ff508b11b459.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://uploads.strikinglycdn.com/files/71922e23-2a9f-4301-a03e-f9793da849bb/panasonic_kx-tem824_software_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9165213-8cb3-41db-b2b8-86cb29a91437/what_are_the_types_of_workshop_accident.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75b5eab0-5f9c-42b1-8e7f-73d7e9670685/53307363984.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e0d08a9-7aea-4c14-a969-e663c50b7621/ninestars_trash_can_lid_adjustment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf619d30-f045-4bd0-84e7-d79a713fe989/55419502180.pdfIn PDF document text
    • http://numefen.pbworks.com/f/how_to_get_minty_pickaxe_for_free_no_code.pdfIn PDF document text
    • http://vawijoj.pbworks.com/w/file/fetch/144661323/how_to_make_coding_easy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77312aed-9ff6-4c78-88cd-8e88d36314e1/2020_kia_soul_manual_transmission_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3042bfe5-541f-486a-b9d7-5544dfadf5f3/belifenunor.pdfIn PDF document text
    • http://vinivat.pbworks.com/f/41945091880.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c237f1f4-f719-4750-8655-38bfe340878d/98337040279.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e169a89c-4c1c-488e-8592-5a020553abc3/porarivesogozofo.pdfIn PDF document text
    • http://daridameku.pbworks.com/f/multiplying_and_dividing_radicals_with_variables_worksheet.pdfIn PDF document text
    • http://minuwaxiper.pbworks.com/f/10030497140.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c992a9c-a34f-45aa-9648-6cda57f2a5de/netgear_router_wgr614v9_firmware_upgrade.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF97 5204 bytes
SHA-256: 91523e59be689e56d879a39b56a917de32704109fb4e637d278f759b93b455fc
font_01_sfnt_off0000e134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE134 12500 bytes
SHA-256: b596a3b38f02e25f1f5e4031d077390e8172e06d8f54718dd3097910438dc4d1
font_02_sfnt_off00010990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10990 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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