Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0078453c3fa352c…

MALICIOUS

PDF

74.8 KB Created: 2021-03-18 00:09:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f3625cbdd7ea1783a3ef5faab2ea53e9 SHA-1: 10fa1b1d7823970c7498a8f129e09f1bbd478e9f SHA-256: c0078453c3fa352c944ef31002a3e28504a57edaba27c7a619e3c8ef49c54152
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 0.9996

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://golowaki.ru/wix?keyword=ge+quiet+power+2+dishwasher+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408001/normal_6012a382746b3.pdfIn PDF document text
    • https://cdn.sqhk.co/bigulikexupa/gjbpU1r/razer_blade_15_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472788/normal_602d5b561fed9.pdfIn PDF document text
    • https://cdn.sqhk.co/lajakukilo/c30kjas/fafebitebatosoluba.pdfIn PDF document text
    • https://cdn.sqhk.co/vamunidibu/yZbq7ge/fake_gps_location_iphone_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380083/normal_5fee3c6178526.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401545/normal_5fe58cd6833a7.pdfIn PDF document text
    • http://vaxiliwu.medianewsonline.com/85275590757.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469351/normal_5fe9065480db1.pdfIn PDF document text
    • https://cdn.sqhk.co/zelosoza/yAijUhd/mr_bowman_secret_life.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488322/normal_60245325bd493.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nejesezape.myartsonline.com/samsung_note_3_price_in_south_africa.pdfIn PDF document text
    • https://c36efdde-2309-4ce2-a10d-b6df2ce12cd8.filesusr.com/ugd/e98059_6211027e80274cf484643f147a72e139.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b319197-5587-4202-a410-073507036ce6/16493398164.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15b906d9-1057-40d2-91a6-9f1ccd3e0699/vegutudivusar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3c23e24-2b19-4e0e-8073-60a4311bb667/summer_escapes_15_ft_pool_instructions.pdfIn PDF document text
    • http://gizixaxeviduf.myartsonline.com/rubuvejimopa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47be18c8-1483-448b-b9f6-9062cff45773/89776989853.pdfIn PDF document text
    • http://zutaturusix.myartsonline.com/pipojapelinelimuzo.pdfIn PDF document text
    • http://todifisafi.atwebpages.com/67049493391.pdfIn PDF document text
    • https://74fc1a11-d445-4ffb-bc6b-7a79e5a65a18.filesusr.com/ugd/097bd5_c76447d063e042e8895eb40f53d5f085.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F1 5580 bytes
SHA-256: b945b850112285153015d5e6f661b474485bd559d376a0f28050dd56742b08db
font_01_sfnt_off0000f8d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D4 10716 bytes
SHA-256: 4ee83fd71464d1fb5ec57cba96de5b3de4b7be2238f5424f5711fc5ec0597968

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