Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd1370213aae769e…

MALICIOUS

PDF

87.2 KB Created: 2021-04-11 03:25:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e39ded07e3ca1f7a98303d6947606a22 SHA-1: b3cecc3a364201365142f50bb7b267a0e7048627 SHA-256: fd1370213aae769eb849e024bb9d20bf6de43fc2e298116d45a1db6c19e56e8d
126 Risk Score

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 0.9993

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://baarspo.ru/strik?utm_term=warm+bodies+full+movie+watch+online+in+hindi PDF link annotation
    • http://xawamiwupajev.mygamesonline.org/41606265216.pdfIn PDF document text
    • http://magnetfix.store/pakistan_studies_book_for_bsc_in_englishcnff7.pdfIn PDF document text
    • https://dotomogef.weebly.com/uploads/1/3/4/7/134760479/657a8ac06460a.pdfIn PDF document text
    • http://rejamar.sportsontheweb.net/cuanto_es_1_32_en_mm.pdfIn PDF document text
    • http://xenejesujotolud.mypressonline.com/difference_between_case_hardening_and_surface_hardening.pdfIn PDF document text
    • http://sasujunine.iblogger.org/brgschaft_friedrich_schiller.pdfIn PDF document text
    • https://zunazodofi.weebly.com/uploads/1/3/4/6/134636935/jalodiwinimatiju.pdfIn PDF document text
    • http://dazavaluk.mygamesonline.org/pepewod.pdfIn PDF document text
    • http://xomutukegadoj.mypressonline.com/gegaw.pdfIn PDF document text
    • https://dapasubasawesol.weebly.com/uploads/1/3/4/3/134383907/6752819.pdfIn PDF document text
    • http://ronojalad.22web.org/atresia_ani_adalah.pdfIn PDF document text
    • http://1fps.ru/554976019560yl2.pdfIn PDF document text
    • http://dimax.website/jinexuz9d8z.pdfIn PDF document text
    • https://faboduvo.weebly.com/uploads/1/3/5/3/135343103/feref-xikavowez-goxevofevufi.pdfIn PDF document text
    • https://tipolapuponawog.weebly.com/uploads/1/3/2/6/132696210/4511730.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lezevefujo.rf.gd/cerebyx_davis.pdfIn PDF document text
    • http://bafuwujix.atwebpages.com/55222508320.pdfIn PDF document text
    • http://xebudulo.rf.gd/sitevogexaxeluruvozufeva.pdfIn PDF document text
    • http://besajepe.epizy.com/wifi_esp8266mod_datasheet.pdfIn PDF document text
    • http://madepadejatutof.onlinewebshop.net/7591582389.pdfIn PDF document text
    • http://xolevusafo.myartsonline.com/65546083868.pdfIn PDF document text
    • http://noroved.myartsonline.com/biosecurity_act_2020.pdfIn PDF document text
    • http://juwafazorames.epizy.com/diziwafutoz.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_off0001177a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1177A 5568 bytes
SHA-256: 8fc7056d755c79c8d5dbd58828a2a2a1e4fe0d30701f4d16edfb680c0e67f16d
font_01_sfnt_off00012a5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A5A 10836 bytes
SHA-256: e220ccf0daa51f6e951ac952d32a6569a33523e8e147a4bc2c4e8960326d66b6

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