Malicious PDF — malware analysis report

Static analysis result for SHA-256 46cf8e14e5f1eeb3…

MALICIOUS

PDF

100.4 KB Created: 2021-05-09 11:20:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: db9550a1df7d5779ef658b4f2f6c7c2c SHA-1: b3aabc95af04660823653f5e24a56360720e188d SHA-256: 46cf8e14e5f1eeb3f848c09b2ff5200bac32d82496bf42f4b3aa658a60e7f7cd
126 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many pointing to disposable hosting and employing UTM parameters, indicative of a link farm designed to redirect users to potentially malicious sites. The presence of external URIs and the overall structure suggest an attempt to lure users to phishing or malware-hosting pages, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://druttle.ru/strik?utm_term=my+side+of+the+mountain+summary+chapter+3 PDF link annotation
    • https://cdn.sqhk.co/wofikubid/dCXp87H/hearts_of_iron_5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415783/normal_5fdc72a8777f2.pdfIn PDF document text
    • https://negopipeminote.weebly.com/uploads/1/3/4/8/134885603/4502074.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/iihhef5/96373328558.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487184/normal_606b9de0649d4.pdfIn PDF document text
    • https://cdn.sqhk.co/waxolulum/f0HQgfs/wwe_mayhem_scan_toy_code_free.pdfIn PDF document text
    • http://rofogukiluvupu.mygamesonline.org/tuxotatiw.pdfIn PDF document text
    • https://cdn.sqhk.co/wemorapi/eT2s33u/telehealth_occupational_therapy_jobs_salary.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407306/normal_5fdef53926e48.pdfIn PDF document text
    • http://viwafuxofiseko.getenjoyment.net/antrenmanlarla_geometri_2._kitap.pdfIn PDF document text
    • https://sekilulijafos.weebly.com/uploads/1/3/1/4/131438177/6721165.pdfIn PDF document text
    • https://dupagerenukuxat.weebly.com/uploads/1/3/4/7/134751723/b32c5dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454821/normal_60291b0326137.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451363/normal_6014ec4e2efa9.pdfIn PDF document text
    • http://rowowevu.mypressonline.com/labuzizati.pdfIn PDF document text
    • https://kelezisexuva.weebly.com/uploads/1/3/0/7/130739204/notatidog.pdfIn PDF document text
    • http://pexarinolal.mypressonline.com/quote_as_a_man_thinketh_so_is_he.pdfIn PDF document text
    • https://najatiwexit.weebly.com/uploads/1/3/4/0/134041182/ec62d73936.pdfIn PDF document text
    • https://cdn.sqhk.co/madagijoj/tii2Ugf/calendar_template_2021_indesign.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/21a667e2-9c11-4b59-9d59-ec242b728763/30366177301.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d04d3f4-56b0-4298-b9b4-bcaacb9d0b30/27807901141.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6e2c085-d298-493a-ac44-81fb92cd145e/24353434622.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37bb7ca4-d103-450c-86da-28a38f5aae83/lords_of_chaos_streaming_sub_ita.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_off00014db2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DB2 5632 bytes
SHA-256: e365ae69cecc1ad0cc8d1a1942682ea5ec4ef658a2fad81a81dac302c60d9aba
font_01_sfnt_off000160ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160CA 10276 bytes
SHA-256: 736905e8e5976e286174096bdbd2067ef937616aab8d78f3fa351c1bf0e9d4c8

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