Malicious PDF — malware analysis report

Static analysis result for SHA-256 28614d0495c1d27d…

MALICIOUS

PDF

71.9 KB Created: 2021-06-10 06:19:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 02c8e4e7f777a2b3390ac74df74eb471 SHA-1: eafe11359eea349039b29f15698aa69adae5edd3 SHA-256: 28614d0495c1d27d509ab2979bba0ef5b384824554c215653ebbecce47068729
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9991

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://krisoc.ru/pbw?utm_term=mini+militia+unlimited+ammo+apk PDF link annotation
    • https://dulifemubal.weebly.com/uploads/1/3/1/3/131398350/edd393e0e30f.pdfIn PDF document text
    • https://potunajasufa.weebly.com/uploads/1/3/1/3/131381619/padoxebexaziro.pdfIn PDF document text
    • https://tadilagene.weebly.com/uploads/1/3/1/3/131381422/616240.pdfIn PDF document text
    • https://fusewire.weebly.com/uploads/1/3/0/7/130776481/wopatabesiguze.pdfIn PDF document text
    • https://vuvowopivuvi.weebly.com/uploads/1/3/1/4/131410126/ketone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390382/normal_60c1540a7918c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369638/normal_601e42b7139fb.pdfIn PDF document text
    • https://wepomifid.weebly.com/uploads/1/3/4/6/134676114/3252e802.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403948/normal_601aef82cf4d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370317/normal_5fdd8af7dd5a9.pdfIn PDF document text
    • https://wonimigapikil.weebly.com/uploads/1/3/7/5/137509794/doradekizefife-waweguzokuxu-losogawevov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413966/normal_601fbbfd71645.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/c931886e-8d2a-45a1-b215-6eeddf7ea4d4/82325665896.pdfIn PDF document text
    • http://pekazaxe.pbworks.com/w/file/fetch/144992829/asian_drama_tv_apk_download.pdfIn PDF document text
    • http://favakiwosut.pbworks.com/f/waludokitusu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c59d4f93-250a-4e67-8a55-43598a6c9613/89389233580.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01165fcf-99d6-4b77-8d2d-6e70bad45873/aufgaben_brche_klasse_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1478c4f8-ff6c-47eb-9efd-00fe22e90ae0/how_many_quart_jars_fit_in_a_12_quart_pressure_canner.pdfIn PDF document text
    • http://lifelekufa.pbworks.com/f/6789601956.pdfIn PDF document text
    • http://pezaloribed.pbworks.com/w/file/fetch/144492357/how_to_fix_jbl_flip_3_charging_port.pdfIn PDF document text
    • http://giribuv.pbworks.com/f/pemodofuvupux.pdfIn PDF document text
    • http://xuvabufoj.pbworks.com/f/farkllama_organogenez_ksaca.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28bd67c3-252e-488d-8699-262cfdbff20d/download_twilight_2008_full_movie_in_hindi_hd.pdfIn PDF document text
    • http://betifabito.pbworks.com/f/36314839839.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_off0000dc20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC20 4900 bytes
SHA-256: 6fa61d08a3725567dce369cd5bb2ee6ea09e2b8d15fd17a5a9e6309c5d5914a8
font_01_sfnt_off0000ecc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC8 11272 bytes
SHA-256: 5b1dbca4afa1bb46119687dbfca0d3d4612f5df37218798b8764d81d0b1a8053

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