Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae866a8a8143df29…

MALICIOUS

PDF

103.6 KB Created: 2021-03-25 18:03:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 84696462c0af5f7a71b245102809926c SHA-1: 1a8b0693cc6d82a4f4870e22eaac5c6821d23d9b SHA-256: ae866a8a8143df29869db7dbfb5456ab6c891da943f5a2973715e3ced9f3dc26
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://resalured.ru/123?utm_term=acknowledgement+example+internship+report PDF link annotation
    • https://cdn.sqhk.co/vujenibolo/idhahdu/sandisk_memory_zone_app_for_ipad_pro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471455/normal_6042d61704ad8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384632/normal_5fe66cde10b7e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419645/normal_60043756ef3b2.pdfIn PDF document text
    • http://palawawez.mypressonline.com/49643900606.pdfIn PDF document text
    • https://cdn.sqhk.co/zavilisuga/h6tl5gd/51984875481.pdfIn PDF document text
    • https://cdn.sqhk.co/jumupebuvi/cji4ggh/stefon_diggs_choppa_style_video.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382423/normal_602dd5901224e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389794/normal_6042b55fabc07.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/d2L7jgc/lonisolebiluvodizaja.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kawerulim.onlinewebshop.net/chrome_will_no_longer_support_flash_player.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ec09fb1-9616-448a-8391-124c83dc8c15/8780905223.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0c088a1-8020-42ae-a336-4ff9cd1db9d3/best_3d_logo_maker_app_for_android_2020.pdfIn PDF document text
    • http://nakeviw.myartsonline.com/donedibatedamitezafapi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1633977-f062-4a84-8d44-e8dfc3062847/72930771574.pdfIn PDF document text
    • https://9526c93a-d340-4dca-b5fd-2864ff0888c4.filesusr.com/ugd/4c3d6a_87489425bf5d40eba3df2499ef509c7b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1633f4f-3f97-4bdd-8fa4-b4f1de90f845/45885407535.pdfIn PDF document text
    • https://d99c26cc-8c68-456d-a039-1a26994c8d26.filesusr.com/ugd/105a8c_3ee1f9a6c10f42269b8116434a6e9438.pdf?index=trueIn PDF document text
    • https://46c0acaa-de7d-4f46-84f0-c2cf1d8ff7d9.filesusr.com/ugd/ac1638_db9c1e5f1dd3470086da9608feade040.pdf?index=trueIn PDF document text
    • https://724418e0-3ace-43c1-abd8-628b4820fc71.filesusr.com/ugd/6df952_d6e03b3ccc7e4d879177e33176727096.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/00ecf7d8-084d-4a52-ba07-a8653dd399bf/how_to_clean_ninja_blender_gasket.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_off000158b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158B7 5700 bytes
SHA-256: 5b6226f53922bd92317321a41ac362a085c8c0eb74e6b1dd6f4a6c8c22be6107
font_01_sfnt_off00016c10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C10 10876 bytes
SHA-256: 6d290c2108638e4066d07072445570ac1aaa4706300e6ac7fb1ef08317ab0777

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