Malicious PDF — malware analysis report

Static analysis result for SHA-256 15fd1d60a6f16a29…

MALICIOUS

PDF

75.4 KB Created: 2021-02-16 02:50:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: cb7d6b537af896bd09a2ad12764f7bd8 SHA-1: 3075f418b05a4491f77e03b9c5a06a0a11e21af0 SHA-256: 15fd1d60a6f16a298cfe6c93deda9f5b150a496870b8475a920e2904a7b7bcf1
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'link farm', suggesting a phishing or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://bologen.ru/wb?keyword=what%20are%20low%20carb%20options%20at%20taco%20bell PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368468/normal_5fc914ce92334.pdfIn PDF document text
    • https://zetoruribafepa.weebly.com/uploads/1/3/1/4/131452904/jokolavojepimigi.pdfIn PDF document text
    • http://hrushch.space/disco_bowling_gamesgameso1q04.pdfIn PDF document text
    • http://fitokaps.xyz/vuxosufinifali6bhtc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387582/normal_5fe529fd439aa.pdfIn PDF document text
    • https://tuboxivodase.weebly.com/uploads/1/3/4/3/134387713/bumulipa_woruso_lorupaxo.pdfIn PDF document text
    • http://discount50.pro/bengali_new_song_arijit_singhtmjl6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373520/normal_5fcda0e4a379f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471488/normal_5fde10988a164.pdfIn PDF document text
    • https://cdn.sqhk.co/dusimefosix/ijdXggA/not_to_do_list_examples.pdfIn PDF document text
    • http://getfreecreditreport.info/57796069009o5pai.pdfIn PDF document text
    • https://cdn.sqhk.co/nomitusibop/I4aBidD/drag_racing_streets_cheats_ios.pdfIn PDF document text
    • http://esmoney.site/head_soccer_2019_onlinebaanc.pdfIn PDF document text
    • http://yogait.space/keyword_planner_excel_template89vv5.pdfIn PDF document text
    • http://shop-kid-toys.online/dna_and_genes_chapter_11_worksheetupwla.pdfIn PDF document text
    • https://bituxomixa.weebly.com/uploads/1/3/4/1/134131270/ca239e.pdfIn PDF document text
    • http://kaxidabifibag.iblogger.org/app_store_updates_slow.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://wilukejukiroxu.epizy.com/book_report_format_for_senior_high_school.pdfIn PDF document text
    • http://nagivozuzosawax.rf.gd/beautiful_muslim_girl_photo.pdfIn PDF document text
    • http://nevozabewovezo.epizy.com/861280287.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_off0000de5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE5A 5052 bytes
SHA-256: e58e629f5ca1100bf6bb4cfaa147c4436d58dff153bd76581fe565c4378769af
font_01_sfnt_off0000ef8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8C 10212 bytes
SHA-256: 63918e5ecbddf25100f20ce75f78e0bf6396db7af055d6086f57cc05db2e94bf
font_02_sfnt_off0001124f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1124F 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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