Malicious PDF — malware analysis report

Static analysis result for SHA-256 68cca34f69ba3bfd…

MALICIOUS

PDF

76.2 KB Created: 2021-03-16 06:18:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 84488048ff36ec8af3c8ff065e772ff5 SHA-1: 9714e2a53cd63289dc641cc06c9b1de967ca954b SHA-256: 68cca34f69ba3bfd40f1cac64831db168898105fc2b7fd5055c8a3f62b1bf7cd
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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/award?keyword=meralgia+paresthetica+exercises+stretches+pdf PDF link annotation
    • https://cdn.sqhk.co/pigexebobe/jejb7sB/gold_mountain_manor_big_bear_california.pdfIn PDF document text
    • https://dixufewopirar.weebly.com/uploads/1/3/0/7/130775961/runid_daxironedal_jibiwekarizuti_togojilatimatak.pdfIn PDF document text
    • http://bomepufibawil.scienceontheweb.net/affirmative_model_of_disability.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425214/normal_6014a466dd081.pdfIn PDF document text
    • https://zonidazoledod.weebly.com/uploads/1/3/1/0/131070441/vubuxeba-loweto-wububotud-rijomiwapifogo.pdfIn PDF document text
    • https://balabirow.weebly.com/uploads/1/3/4/6/134690292/cc806.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413455/normal_6002113c4d225.pdfIn PDF document text
    • https://cdn.sqhk.co/lopedovev/hfC6ic9/tupazilazuzizuf.pdfIn PDF document text
    • https://cdn.sqhk.co/pisapaxosabo/jcjaijG/wivelubokimazujajawal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378856/normal_6009bf23aac87.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/88951aa3-c00e-4dd2-a9dd-1be6f050fb1f/yard_man_push_mower_replacement_wheels.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc05e245-b3c1-4ea6-8346-004b7d72192e/bugegixafujegig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44b8bd3f-2ab0-4e2a-b4ab-b44829393602/how_do_i_cancel_a_walmart_grocery_pickup_order.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cd57bff-68c7-48bb-9b06-d6fdd5faa34e/libros_en_ingles_para_ninos_de_primer_grado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d4f9895-025e-40a5-a929-06cafb18aa0c/jam_plus_speaker_flashing_blue_light.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03acc675-34a9-4c5d-b36a-f46bebe4dbcc/algebra_2_book_mcgraw_hill.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/077a7709-b05f-4e50-af5a-a4a7fb8825d7/charting_outcomes_in_the_match_2017.pdfIn PDF document text
    • http://jupegojut.atwebpages.com/cretan_hieroglyphs.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_off0000ed38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED38 5488 bytes
SHA-256: 3ab1d001016c2e0d393b0e7d84f917553f4fc184978736739932b10dbdc07920
font_01_sfnt_off0000fff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF0 10384 bytes
SHA-256: 9748a1ec67e54813652b836867eab76a59e72a4e5f89e8843b303dd7485965c9

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