Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cae3825886445e6…

MALICIOUS

PDF

78.7 KB Created: 2021-06-04 04:37:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 88257d58acf9d99b3967c5febb9daa1a SHA-1: 10fef7e5cd512d2a4894c603e1d0ec46c25f6db8 SHA-256: 0cae3825886445e6b582989a9c2bb75c5e0c7967930868366b2e150078f5deef
194 Risk Score

Malware Insights

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

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://wastran.ru/pbw?utm_term=screenplay+character+development+worksheet PDF link annotation
    • https://zadejafiton.weebly.com/uploads/1/3/0/8/130813032/relovisolerizex.pdfIn PDF document text
    • https://ganeravis.weebly.com/uploads/1/3/1/3/131384604/ffc3a4853075.pdfIn PDF document text
    • https://giwizakewat.weebly.com/uploads/1/3/1/8/131857916/rapelakoxevelokedek.pdfIn PDF document text
    • https://kodidenub.weebly.com/uploads/1/3/4/3/134328035/dumevawofidomox.pdfIn PDF document text
    • https://tekoboxini.weebly.com/uploads/1/3/0/8/130814877/51339c.pdfIn PDF document text
    • https://kabuvegezukab.weebly.com/uploads/1/3/5/3/135325093/pinuwukaxumet.pdfIn PDF document text
    • https://noxagutut.weebly.com/uploads/1/3/4/4/134483949/1cfcd5.pdfIn PDF document text
    • https://tuzulenoj.weebly.com/uploads/1/3/4/8/134866727/pepinubobepexisegu.pdfIn PDF document text
    • https://jetasiduneka.weebly.com/uploads/1/3/4/5/134586997/22d03a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e397e52-7785-4be3-98b3-0b864bba76d6/28635089768.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49380ecc-ba64-4456-8e4a-632dffd047a4/72899302487.pdfIn PDF document text
    • http://fulusivijomu.pbworks.com/f/volulevoponovasanonazo.pdfIn PDF document text
    • http://mefijunov.pbworks.com/w/file/fetch/144420468/52806322216.pdfIn PDF document text
    • http://kafunujazuwo.pbworks.com/w/file/fetch/144577860/gadenuf.pdfIn PDF document text
    • http://sisagexal.pbworks.com/w/file/fetch/144505122/wo_ladki_nahi_zindagi_hai_meri_mp3_song_download_new_version.pdfIn PDF document text
    • http://xujefix.pbworks.com/f/90939678384.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed57f40d-89f1-4806-b75b-95772d5cb822/jlab_audio_go_air_true_wireless_earbuds_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10dbe8b6-9505-46d5-ac03-b2b65a4458fe/kotler_marketing_management_16th_edition.pdfIn PDF document text
    • http://jilawuxifi.pbworks.com/f/5__spotlight_module_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8518469-c274-49bf-8ed2-22a5c784f226/basic_mathematics_form_one_notes.pdfIn PDF document text
    • http://damopijos.pbworks.com/f/carnet_entretien_peugeot_508_sw_2.0_hdi_140.pdfIn PDF document text
    • http://kuzimotum.pbworks.com/w/file/fetch/144539541/ferdi_tayfur_benim_gibi_sevenler_filmi_izle.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_off0000ef91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF91 5732 bytes
SHA-256: 1470570b66f08a7cc0b864ea3529f15925f3d18e310b9351c10b04e29ea1510f
font_01_sfnt_off00010309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10309 13036 bytes
SHA-256: 4d71c487f16a5e31d6a5bc4b1778ddf614ee1835656da7dba5a8875c939c961a