Malicious PDF — malware analysis report

Static analysis result for SHA-256 973df516688c161d…

MALICIOUS

PDF

66.5 KB Created: 2021-06-13 00:17:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: cf520348e7fc5f937845507920ec8876 SHA-1: d2fcf6fbcf9e0b9b6caa46edfce762c8f12c236d SHA-256: 973df516688c161dfa8205de72539432e8e00a1db3f922f6d379069d80068f7e
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs pointing to a link farm, indicating a phishing or redirection attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior, suggesting the document's primary purpose is to drive traffic to these external sites. While no scripts were explicitly extracted, the presence of external links and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5460

Heuristics 4

  • 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
  • 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://oniceh.ru/pbw?utm_term=english+grammar+should+would+could+exercises PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414502/normal_60552a376fcdb.pdfIn PDF document text
    • https://pisekubil.weebly.com/uploads/1/3/4/3/134322001/letefibife.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457005/normal_60bc5d55739f4.pdfIn PDF document text
    • https://pavexoseg.weebly.com/uploads/1/3/5/3/135315086/986e85a8.pdfIn PDF document text
    • https://xugatasota.weebly.com/uploads/1/3/4/6/134673622/7991439.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445320/normal_604642bf92da2.pdfIn PDF document text
    • https://mibonapa.weebly.com/uploads/1/3/4/3/134308174/72d8ae53b79c08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406782/normal_605f72e3ba523.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4471948/normal_60b2df13225b6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tuvovazuvezo.pbworks.com/w/file/fetch/145099740/performance_appraisal_comments_teamwork.pdfIn PDF document text
    • http://lufokomarib.pbworks.com/w/file/fetch/144468456/crown_of_midnight_detailed_summary.pdfIn PDF document text
    • http://silasofinat.pbworks.com/w/file/fetch/144478110/jewaxelefopopupovoxober.pdfIn PDF document text
    • http://mokakiw.pbworks.com/w/file/fetch/145173732/how_to_turn_down_hot_water_heater_temperature.pdfIn PDF document text
    • http://gorixose.pbworks.com/f/convertidor_centigrados_a_farenheit.pdfIn PDF document text
    • http://pifiloxema.pbworks.com/w/file/fetch/144689490/11818801174.pdfIn PDF document text
    • http://didaneguk.pbworks.com/w/file/fetch/144740964/reading_comprehension_stories_for_10th_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/216261ec-925a-4508-bd94-82a901a72f43/3361434855.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94d8e221-3827-48c2-a0d7-f21a0427dab8/research_methods_for_the_behavioral_sciences_6th_edition_free.pdfIn PDF document text
    • http://xipulopunag.pbworks.com/f/filmyzilla_bollywood_movies_2019_download_free_hd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cccadedb-7437-476c-9571-ae9f8c827a69/7977546707.pdfIn PDF document text
    • http://jozeluwofe.pbworks.com/f/38743986833.pdfIn PDF document text
    • http://gosirata.pbworks.com/w/file/fetch/144444087/51824717835.pdfIn PDF document text
    • http://wiwedano.pbworks.com/f/creepy_nights_at_freddys_1__android.pdfIn PDF document text
    • http://tubekikewabi.pbworks.com/f/dance_monkey_tones_and_i_piano_sheet_music_easy.pdfIn PDF document text
    • http://mujusevo.pbworks.com/f/mod_cleo_gta_vice_city_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6c5c8a6-d045-4a62-b203-68b6166e9c8f/41756673104.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8154c99f-6b98-430d-a8a7-4bbf4d7b9362/como_sacar_pasaporte_por_primera_vez_en_costa_rica.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC8 5468 bytes
SHA-256: 034905182e6a3a0ea08337db11c7fd2ad90793ad29549b174bf324e8c762479a

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