Malicious PDF — malware analysis report

Static analysis result for SHA-256 90be3594b3e9851d…

MALICIOUS

PDF

67.9 KB Created: 2021-04-07 17:38:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fff2f7f430d1e7e9b6a2b705c9c2c501 SHA-1: f763a9ced41b6ac893a3c369bba99b58320de652 SHA-256: 90be3594b3e9851dff10316d22a667c38b9b851685a69e7d881d53e87632771e
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 0.9992

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 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://soxebez.ru/wix?keyword=thomas+pacconi+ornaments PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420441/normal_606628d6e80e9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406820/normal_5fcd8ea1e1f32.pdfIn PDF document text
    • http://tigafik.mygamesonline.org/baltimore_orioles_schedule_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459055/normal_603501ca402b9.pdfIn PDF document text
    • http://gelupulofevabek.medianewsonline.com/fabulous_an_anthology_of_short_stories_download.pdfIn PDF document text
    • http://dotavulilego.mypressonline.com/51440451144.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448551/normal_60650611cd1e0.pdfIn PDF document text
    • http://wukuname.mypressonline.com/kefekuzerapuxewibi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dopugaxelelema/does_krav_maga_actually_work.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8a83df7-dacb-47ef-ba83-2c95a57e4a0e/warajaweg.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/jane_austen_pride_and_prejudice_chapter_1_analysis.pdfIn PDF document text
    • http://xunudijumo.myartsonline.com/point_biserial_correlation_spss.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/tuzinagimesewitaluwanekib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/603d8421-eeb6-4fe3-8a07-ad688da5c5de/73800879944.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3322a5b1-8308-4941-94bf-90e1767e3d89/62386315571.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11ebb81a-c954-495d-8dc4-afd4e6a55506/rifurul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d180ff7b-82bb-42b0-9f54-70f89c15236d/apache_shiro_is_dead.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/tesla_model_3_long_range_battery_capacity_kwh.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/79403042259.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c31a5ee3-7e7e-4739-b827-498a490ada7a/18211049285.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/67382604342.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0b711a7-47c1-40f1-9e26-88e1efd128ab/57231180714.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/246a1bbc-bf00-416a-a82c-59ab0e5651c4/49370875685.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7df374c4-0d17-4116-b1e7-dd6a18a8c5ad/remukimex.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_off0000cfc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFC0 5088 bytes
SHA-256: a3d83ef0e8e04033b4250b3f6a9f30a447d870e9773080c33650bc7d7acd0e0f
font_01_sfnt_off0000e0dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DD 9780 bytes
SHA-256: 1f0208e4d204e3d264e5fb7bd1308dc9c0393afda89f7ce1a9f24abb00addb0d

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