Malicious PDF — malware analysis report

Static analysis result for SHA-256 806a7b860b2499ee…

MALICIOUS

PDF

71.3 KB Created: 2021-01-18 11:22:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 5d38c855301f3b5192f0341b5c7f89b0 SHA-1: cbecad02695f33c60c357c0cea2b1c0bb90d5833 SHA-256: 806a7b860b2499eec37e6b7722d9fa98f96431e0ccd4f4fa6dff1b15ed3c25e6
244 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wb?keyword=lightroom%20download%20for%20pc%20windows%2010 In PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/f6c1e8299.pdfIn PDF document text
    • https://site-1180978.mozfiles.com/files/1180978/macromedia_freehand_10_free_filehippo.pdfIn PDF document text
    • https://site-1227499.mozfiles.com/files/1227499/79050806636.pdfIn PDF document text
    • https://site-1185944.mozfiles.com/files/1185944/1302226454.pdfIn PDF document text
    • https://site-1178075.mozfiles.com/files/1178075/nowosiw.pdfIn PDF document text
    • https://xuvakaxatal.weebly.com/uploads/1/3/1/0/131070170/pejenokisibu.pdfIn PDF document text
    • https://tedajurilazunu.weebly.com/uploads/1/3/0/7/130739962/0717e.pdfIn PDF document text
    • https://cdn.sqhk.co/sejarepezibo/jgrggic/vr_horror_videos_free_download.pdfIn PDF document text
    • https://site-1171112.mozfiles.com/files/1171112/nunujomuluxuwivamuxamatu.pdfIn PDF document text
    • https://nosikofu.weebly.com/uploads/1/3/4/7/134724553/sapirapekak.pdfIn PDF document text
    • https://kutenamig.weebly.com/uploads/1/3/0/7/130740069/zufimudugagab.pdfIn PDF document text
    • https://lafajadisevo.weebly.com/uploads/1/3/1/4/131454770/korefavosufupotijuti.pdfIn PDF document text
    • https://voxaxaloxedifuz.weebly.com/uploads/1/3/5/3/135399296/4ad12f550f8e1f.pdfIn PDF document text
    • https://ponivigaxuk.weebly.com/uploads/1/3/5/3/135313456/fipobepibezelafajale.pdfIn PDF document text
    • https://fobamenowukar.weebly.com/uploads/1/3/4/4/134485242/gekufaramed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wikilupari.epizy.com/affidavit_template_family_court_nsw.pdfIn PDF document text
    • http://bimekikup.epizy.com/dutox.pdfIn PDF document text
    • http://bemawom.rf.gd/aadhaar_update_form_filled_sample.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_off0000d7d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D4 5796 bytes
SHA-256: 9576deac93c89de8b5d6729a9303595ddb52b0a8cc29e4a08add4669bbe18e72
font_01_sfnt_off0000eb80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB80 10748 bytes
SHA-256: d6fdd9da51f76a10088210ddea0bccc397f84fa88ea598fdbde7a1c9230ce272

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