Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9e2616cdbcde4bb…

MALICIOUS

PDF

77.8 KB Created: 2021-03-23 22:24:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f6ca9a5f3cd4170f1c940728b03dcf5e SHA-1: 5e53d1e28bf4dd8dbca178e2ee4dd7ef36d16380 SHA-256: e9e2616cdbcde4bb0897a516b0895ddb110b2551ec5675875c2bb5683e94223a
176 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. 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 6

  • 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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/123?utm_term=after+we+collided+read+online+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4384819/normal_5fc948cd4389b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405950/normal_603dc6c0316ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447093/normal_6057c5cd92f26.pdfIn PDF document text
    • http://nexagufobutuf.22web.org/cambio_climatico_en_colombia_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2cc12256-1025-444a-bacb-901a9f007bda.filesusr.com/ugd/d1fcfc_9dab1b3b4aae4b8496ef35a2047f9dfd.pdf?index=trueIn PDF document text
    • http://pewazeje.rf.gd/54212534449.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/sgs_hanuman_chalisa_telugu.pdfIn PDF document text
    • http://biguvuxurezuto.epizy.com/jewurixesitapizujipitened.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/xelozagupanugadopoket.pdfIn PDF document text
    • https://f8b2de7a-6012-4721-b8f1-df5267d6bb95.filesusr.com/ugd/8ebb60_2cc031cb73954f73a58c299279dee695.pdf?index=trueIn PDF document text
    • https://36622f5a-5a1b-41a5-aa98-965156e47ac2.filesusr.com/ugd/804ff6_777cca4a316f448db18e07aebf990190.pdf?index=trueIn PDF document text
    • https://f06ae689-34e6-4fd9-b749-a5985747e370.filesusr.com/ugd/4117a9_de6359c3d39a4a4d9a8c1f1c92043fa9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xulikamul/bollywood_film_share_online.pdfIn PDF document text
    • http://nuworeri.epizy.com/what_is_elements_and_principles_of_design_definition.pdfIn PDF document text
    • https://a5a7f18c-b887-48a0-80cc-3627c14345d5.filesusr.com/ugd/609f59_33efb221ae1245dea231f2b8d8ee55da.pdf?index=trueIn PDF document text
    • https://850a36a1-966c-46c3-86ed-e15bcb5778a7.filesusr.com/ugd/ede58b_92ee9d1a7bba430a88b67ac3aa166aca.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wonumafubij/domafotizavo.pdfIn PDF document text
    • https://4123e755-5e7e-4fb8-b167-49ba90d37259.filesusr.com/ugd/fd3290_fac1d392ef8a4a9b9d959f3b3ffffe68.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/53139650779.pdfIn PDF document text
    • https://1527c8d3-3321-4e9f-872f-e2bebb57bac2.filesusr.com/ugd/bf2d42_51f6210ca0d04696b6b8deb3d6b2a1ad.pdf?index=trueIn PDF document text
    • https://67258aaf-84c5-4a88-bfd2-1aa7ddb6c27a.filesusr.com/ugd/850f07_4e86234d343f431fb652c40a5eda0bee.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/55508235242.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_off0000f287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF287 5052 bytes
SHA-256: 79b5f9cfb54f0e6457972a57036a87d03f8837c2f786bc570a2a1379f7aec277
font_01_sfnt_off000103dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103DD 11208 bytes
SHA-256: 5576379b789f00e4e33a998f55e4dd2b074781a75ee89acd3d3bfb6363091a39

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