Malicious PDF — malware analysis report

Static analysis result for SHA-256 735fe2e7e4670bcd…

MALICIOUS

PDF

70.5 KB Created: 2021-03-04 19:48:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: dc411355dcc83a7facfecae140499387 SHA-1: f8aff99f7cc37be72538600d9fcacef5a94cdbba SHA-256: 735fe2e7e4670bcd0f20a9df1725dedd394bcef0cdb8ea67849cb49d84d022c7
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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://mezovuduw.ru/wix?keyword=33.1+the+circulatory+system+worksheet+answers PDF link annotation
    • https://rakimazigikan.weebly.com/uploads/1/3/2/3/132303322/05870f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469365/normal_5ff64e48ac769.pdfIn PDF document text
    • https://cdn.sqhk.co/zapajugadira/lAGkahe/64747682681.pdfIn PDF document text
    • https://cdn.sqhk.co/bifugudawesu/BsOggoy/billingsley_creek_fishing_report.pdfIn PDF document text
    • https://cdn.sqhk.co/kufiremikaf/gfEWgcU/hotel_ocean_dream_cancun_tripadvisor.pdfIn PDF document text
    • https://cdn.sqhk.co/vimexuda/Ehgibid/ocean_island_survival_3d_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/sewadokoka/2jaolhf/were_khloe_and_tristan_ever_married.pdfIn PDF document text
    • https://cdn.sqhk.co/waxoxewanuvi/jg8jjhg/scp_173_voice_video_calling.pdfIn PDF document text
    • https://jofanota.weebly.com/uploads/1/3/2/3/132302765/5967788.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383322/normal_5fdc65e96b62d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369760/normal_60258a6727f69.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cd753cf5-d90a-4073-9c55-931a76e81761.filesusr.com/ugd/8826df_789695fe6e0240668b5dd30f1404f0b5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zisulamisozoto/89976328862.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/ayyappa_devotional_songs_malayalam.pdfIn PDF document text
    • https://8fc1c2d6-49ba-4d63-8b95-0327ef2b1627.filesusr.com/ugd/1849a1_6a6336f1ee374d2abfd3dfe33844f34c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dagasopones/tepur.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/jagikigipegobokidifejinud.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_off0000d7fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7FB 5452 bytes
SHA-256: 7823b09591000adf422354832c1850ba9741191bc8050e8bdb9c9943cabcdfed
font_01_sfnt_off0000ea7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7A 10016 bytes
SHA-256: e38bb5e679ecc89329e1dab098e654f3bb32610a3a0c9aac26dc190231981e74

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