Malicious PDF — malware analysis report

Static analysis result for SHA-256 02ea1f4727706bfa…

MALICIOUS

PDF

80.2 KB Created: 2021-03-25 09:40:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: a02a1d192d50ed77101a8049be7af576 SHA-1: 087a4b9de6b6d6b68dc9e0154e114d15ef6a0d73 SHA-256: 02ea1f4727706bfae5dd77408a294d7ae81bc3c0862d5ca4ace5621b28f728a4
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The primary external URL points to a resource that appears to be a lure for 'unit 14 level c vocab answers'. No scripts were extracted, but the PDF structure and numerous external links strongly suggest it's designed to redirect users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://vilenefex.ru/wix?keyword=unit+14+level+c+vocab+answers PDF link annotation
    • https://zogadinarele.weebly.com/uploads/1/3/1/4/131409244/xuzowetox.pdfIn PDF document text
    • https://cdn.sqhk.co/juxerawabuf/fiaG0ih/votelukosaxe.pdfIn PDF document text
    • http://getporte.xyz/repomekejunefegogadck2i.pdfIn PDF document text
    • https://cdn.sqhk.co/wazotifuk/fghKiib/faith_family_academy_waxahachie_calendar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470981/normal_600828ca8d209.pdfIn PDF document text
    • https://cdn.sqhk.co/zuzikewed/aLhe0gd/dragon_warrior_3_nes_classes.pdfIn PDF document text
    • https://ravuripuzi.weebly.com/uploads/1/3/5/9/135958818/8571297.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461483/normal_602e3788d55e8.pdfIn PDF document text
    • http://gatorama.fun/wopesonajitivibariweta5p7o8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386354/normal_602090c5cf298.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502248/normal_604dcb06cafe0.pdfIn PDF document text
    • http://fb-ig-copyright.com/80815003927wh1pu.pdfIn PDF document text
    • https://lojopozubog.weebly.com/uploads/1/3/1/6/131606756/fa6b09b5ce08e6.pdfIn PDF document text
    • https://wivaxuzavegisi.weebly.com/uploads/1/3/4/7/134769578/d413d1.pdfIn PDF document text
    • http://good-production18.site/el_poder_de_la_oracion_persistentewjpoa.pdfIn PDF document text
    • http://znakomstva69.space/elite_platinum_2.1_qt_air_fryer_manualr3rcn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405409/normal_6002a2b11fa02.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6363ce23-9394-4102-a476-7be320345719.filesusr.com/ugd/7c41c1_4783076bf4134503a2a9dd50b48f0b8f.pdf?index=trueIn PDF document text
    • https://28546a20-d0cc-4b82-bb4f-6711990cd5a3.filesusr.com/ugd/0bcf16_6da41393042848709f7270ab385b913d.pdf?index=trueIn PDF document text
    • https://33c7e2ec-32fc-4676-a642-9d95a4379e01.filesusr.com/ugd/622218_3a02eca579f64483918ed8609258f730.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/47de84e5-2fdb-4921-b737-14ed7ce2c994/92510663077.pdfIn PDF document text
    • https://3ecb585b-79b8-4502-8567-d9a17299c5c1.filesusr.com/ugd/4b874d_e74237be36fe4a0485f5b52c7e651b0d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/afee0971-3ff5-49d6-b12a-5bd6d00f5e0a/how_to_get_murgee_auto_clicker_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed073bf1-b337-4a34-816e-260b0f44ce58/what_is_contemporary_culture_in_latin_america.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff2ecd53-f20e-4aa3-b039-2159343b1524/how_to_connect_tv_ears_to_netflix.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA52 5216 bytes
SHA-256: 74b25901839c22f60dbe1dba1b9a0412c117fff781e5390ed8b95432d308120e
font_01_sfnt_off0000fc42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC42 9644 bytes
SHA-256: efbb2f978744df8b698e2ac4040a1f078e5406d917f2472bb0428834e29aa194
font_02_sfnt_off00011d6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D6C 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501

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