Malicious PDF — malware analysis report

Static analysis result for SHA-256 e34c17fe2d1cf00b…

MALICIOUS

PDF

80.8 KB Created: 2021-03-10 21:59:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e815823f3a057397d3b22af359481df6 SHA-1: 6b5bef98aef925f3e396752b8adbfaeddb3acaf4 SHA-256: e34c17fe2d1cf00bb551263ef1c93e4a12f710fe81bbd4ea0cc597b0e3eaa811
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 0.9996

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://fokemale.ru/wix?keyword=techoxygen+frp+bypass+apk+2017 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379723/normal_601855ba421d5.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/jisjaif/wikipedia_wikipedia_the_free_encyclopedia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408862/normal_602a88dabb83e.pdfIn PDF document text
    • https://cdn.sqhk.co/vajirasavuz/eJhgUs9/76182265969.pdfIn PDF document text
    • http://sfhgfje5df.xyz/741658890692h2l2.pdfIn PDF document text
    • http://dilijox.22web.org/tasabupepigovodawikajaxa.pdfIn PDF document text
    • https://cdn.sqhk.co/nubavojek/hfIhbjd/super_princess_go_jungle_worlds.pdfIn PDF document text
    • http://idealica-italy.site/677827828719f98l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376087/normal_602109f12d558.pdfIn PDF document text
    • http://iclod.tech/93994685216z67jt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481510/normal_603d1929962b3.pdfIn PDF document text
    • https://cdn.sqhk.co/rufopunuk/CgiaAYl/bugaletebimusigumifa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462096/normal_5ff771ae6c60a.pdfIn PDF document text
    • http://kuziluzesoga.22web.org/7835144595.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
    • https://uploads.strikinglycdn.com/files/84363c84-c2e7-4dba-a227-f058431e884e/baxumozemal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2a573ff-9f35-43f8-95f8-7c44ba82f5b5/brother_hl-2170w_wireless_setup_mac.pdfIn PDF document text
    • http://parezuz.rf.gd/48645391389.pdfIn PDF document text
    • http://birapuwagij.epizy.com/ligiwuxata.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/367df319-1628-4fca-ab92-e8ed28c592cf/44136898492.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/def4e57f-60e3-49aa-8957-c85607d14ebe/3rd_grade_activities_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3723315-5fdb-4269-b207-0c4424b9fa26/can_poor_countries_become_rich.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_off0000eb68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB68 5636 bytes
SHA-256: b2ce770ff98a66bde1604c42c6a9247aec52b338c9cbb3be419a0bdf9687f9bc
font_01_sfnt_off0000fe8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8C 12392 bytes
SHA-256: e7fc9bb128a4405296d118e1580a7d848735279fe13b9a13cb196a191be9d4b4
font_02_sfnt_off0001274a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1274A 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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