Malicious PDF — malware analysis report

Static analysis result for SHA-256 c579baaa67cf360e…

MALICIOUS

PDF

81.6 KB Created: 2021-03-21 09:26:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: cdd0c94bbcc1abd028cda04fc9f47a6a SHA-1: 36bc20a0769d4b093f7323099b6b150635afc4d8 SHA-256: c579baaa67cf360e789bce185a17e38e9d5c471a065d33fc7109a45167b974f2
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 0.9990

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/strik?utm_term=corsair+760t+black+atx+full+tower+case PDF link annotation
    • https://mofasabopileb.weebly.com/uploads/1/3/4/1/134109330/2981103.pdfIn PDF document text
    • https://cdn.sqhk.co/wabasenenem/hjFjehj/27499676181.pdfIn PDF document text
    • http://mosuxuvemuzuwex.mywebcommunity.org/weighted_average_method_of_inventory_valuation_example.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414501/normal_5fd9b515dc3b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472763/normal_603a8dc191ff1.pdfIn PDF document text
    • https://nokejulaju.weebly.com/uploads/1/3/4/6/134696540/wamomijowuvox-jaxagajepeju-soninojolotetu.pdfIn PDF document text
    • https://tisemadu.weebly.com/uploads/1/3/4/3/134387657/5196537.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499285/normal_60449f313a0ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481154/normal_6036d857a0e72.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387040/normal_600934e91ce3c.pdfIn PDF document text
    • https://moxigowa.weebly.com/uploads/1/3/0/8/130814106/tuvogokosixotiravul.pdfIn PDF document text
    • http://fapenas.22web.org/what_books_of_the_bible_does_judaism_use.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382958/normal_5ff2569f5d990.pdfIn PDF document text
    • https://cdn.sqhk.co/gurudulep/82c1gcf/dixeb.pdfIn PDF document text
    • http://lonotel.mygamesonline.org/60119155904.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469631/normal_5fe6396322e41.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368238/normal_5fec1f8d66148.pdfIn PDF document text
    • http://jinevul.mygamesonline.org/bryophytes_and_pteridophytes_book.pdfIn PDF document text
    • http://tiwilib.iblogger.org/12th_bio_zoology_practical_book_tamil_medium.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420939/normal_603c38a0dbc52.pdfIn PDF document text
    • https://cdn.sqhk.co/nedupugifuka/hhXgcif/nuvimeruxiruzesomepet.pdfIn PDF document text
    • https://cdn.sqhk.co/nawamuzimosu/R9ptjay/76897765699.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://tugosujamas.rf.gd/calendar_2018_malaysia_template.pdfIn PDF document text
    • http://bamasagure.epizy.com/75668380740.pdfIn PDF document text
    • http://xiwozoget.atwebpages.com/4862312121.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_off0000f267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF267 5412 bytes
SHA-256: 3d7dda76ef8b1147c397087aed3c35b7d764f9b13caaedbb2bd800bd91b661ba
font_01_sfnt_off00010501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10501 10924 bytes
SHA-256: 73c8116c1b544343344c3737ca41562b256f511f0cbbde80154598f2e10bec3d
font_02_sfnt_off00012a25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A25 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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