Malicious PDF — malware analysis report

Static analysis result for SHA-256 15b92e43cfc92de4…

MALICIOUS

PDF

71.1 KB Created: 2020-12-23 03:01:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 53605a9ce1fe58d41ea358d2d1e40383 SHA-1: e8c3586e7eb2ea9262c86c8424d733b190e2dc8a SHA-256: 15b92e43cfc92de43c116d37b275c73ecbacaeb50baabbe33f6867e3b486dedd
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. The PDF contains a large number of external links, many of which point to PDF files hosted on cloud storage services, suggesting a link farm or redirection mechanism. The primary URL identified is 'https://traffine.ru/123?utm_term=hammocks+beach+state+park', which is likely used to direct users to malicious or phishing content.

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 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.
  • 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://traffine.ru/123?utm_term=hammocks+beach+state+park PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4419211/normal_5fcd6201c7119.pdfIn PDF document text
    • https://serawododi.weebly.com/uploads/1/3/4/8/134885696/xagokevabasaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388158/normal_5fdae8c46b230.pdfIn PDF document text
    • https://pozanabuloga.weebly.com/uploads/1/3/4/3/134366917/sofosiwefefukulepamo.pdfIn PDF document text
    • https://fobewesepujub.weebly.com/uploads/1/3/2/3/132303403/lanafuduv_mowofirojuxuwut.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://s3.amazonaws.com/xazarujokemus/24563907068.pdfIn PDF document text
    • https://s3.amazonaws.com/xeruxaxer/connexions_mthode_de_franais_niveau_1_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9aa16bf6-73b7-481e-aaa1-fb464e16ba1d/aaliyah_try_again_download_song.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/4861596461.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64ef752f-a185-46e6-9c8c-b602fd541c05/fivofepeliparoxemen.pdfIn PDF document text
    • https://s3.amazonaws.com/wisatutadi/december_25_zodiac_sign_compatibility.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4c58d68612547ed76cd6f/t/5fcd2639920f47545b9c56b1/1607280186800/define_invaluable_antonym.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/psd_to_jpg_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc394550a2757459bf3c614/t/5fc46e003485235c86542a1b/1606708736684/vasiburejaforexatazarol.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_off0000cd1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD1C 4940 bytes
SHA-256: 72adc061458152ba5fce15b54fa6f48f4a4672f57e512531622048a284f7592b
font_01_sfnt_off0000ddd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD8 10256 bytes
SHA-256: 9d0a94ea14e47c8f451273373df9ee1d54ee2d38746a3bdd745cf620818d5b80
font_02_sfnt_off0001011a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011A 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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