Malicious PDF — malware analysis report

Static analysis result for SHA-256 79d34bd05af92b9b…

MALICIOUS

PDF

78.2 KB Created: 2021-03-23 18:45:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 4f50234611dd3c2e9a42695a7b9dc713 SHA-1: 580c23371d299fb1dcf44423d8d35c74e3126639 SHA-256: 79d34bd05af92b9b60ff818feed071e4f786041dadd24c882bd95ff093d683bc
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://jumiwimov.ru/wix?keyword=3+mistakes+of+my+life+pdf+in+marathi PDF link annotation
    • http://xizuwekimexuwag.22web.org/what_is_meant_by_data_pointer_in_microcontroller.pdfIn PDF document text
    • http://geramik.22web.org/sun_joe_spx3000_for_sale_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/puzadowoke/Zijieco/69564779776.pdfIn PDF document text
    • http://jabakibiv.iblogger.org/fur_elise_piano_sheet_music_original.pdfIn PDF document text
    • https://cdn.sqhk.co/fofotixoz/0gjhbC7/oconnors_pub_pawling_ny.pdfIn PDF document text
    • https://cdn.sqhk.co/xewafazuk/geIQhi2/run_in_crowd_apk.pdfIn PDF document text
    • http://fsfsfd.xyz/virus_news_today_scotland0x0rd.pdfIn PDF document text
    • http://wamuvosuvebupa.iblogger.org/61988542877.pdfIn PDF document text
    • http://ita-talia.fun/lost_at_sea_movies_on_hulumhk6g.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://5fdaa9e0-ad6d-443b-8779-beb8e45026dc.filesusr.com/ugd/05301a_4ca7132256b2474596765656e38753eb.pdf?index=trueIn PDF document text
    • https://5a995288-ce6f-4ae3-a3e6-14272d8003db.filesusr.com/ugd/7be1cd_bd0455e8e6544eeab5938134f66dd576.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/53851eee-c1ac-436a-951d-6810f330b26e/dark_tower_tv_series_1981.pdfIn PDF document text
    • https://275320ff-96dd-455a-9699-a0fdc58b27a5.filesusr.com/ugd/943725_ccd7948aa3644cb092fa1185724ff038.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5de88973-03f0-40b3-814b-48e63abfc56e/5748422054.pdfIn PDF document text
    • https://1618b3f4-dcc0-4047-a816-eeb1cbe43c51.filesusr.com/ugd/a01749_761da760c89741d29a8dad30c75202a4.pdf?index=trueIn PDF document text
    • http://zewikomiwuzi.rf.gd/warranty_forever_demontrond_rv.pdfIn PDF document text
    • https://4cd5a77a-be8d-44ba-8952-4177873115c4.filesusr.com/ugd/930050_e62635a46fc64e3d91e67eb86aeea2d5.pdf?index=trueIn PDF document text
    • http://lekinip.epizy.com/gixilibefofumup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa3f5a4c-88fc-409f-a1b0-0ebf6fad3d49/83148885012.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d4a4859-f560-4087-a309-fcb5651f7e2f/76653357989.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_off0000deeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEEB 5516 bytes
SHA-256: 674789d682503f684a99483b145f1279212f27bde1bbc8d93ee222d87e294887
font_01_sfnt_off0000f18c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18C 11204 bytes
SHA-256: 4192b10e4f74b5a72c30880b3d93efc850fc1cba50ca766fd0d7151fb0c21cb8
font_02_sfnt_off0001182e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1182E 5236 bytes
SHA-256: a47b915050736fb34df425251d52b750d6f9d0aa9751d83f2748df648ba748a2

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