Malicious PDF — malware analysis report

Static analysis result for SHA-256 be41020db66c26e1…

MALICIOUS

PDF

61.2 KB Created: 2021-02-15 07:38:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 77985f914ac5c0545d10479c5e4ba2c8 SHA-1: 3cbee3803f9c6704a2ca92f83c3ee36b3a17c309 SHA-256: be41020db66c26e187bf3ec4bf4c4fc2cc3f3fdf5cd206f380bd36246a55ce08
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/wix?keyword=prentice+hall+writing+and+grammar+answer+key+pdf PDF link annotation
    • https://cdn.sqhk.co/tadanopi/igjaAja/real_drift_car_racing_road_racer.pdfIn PDF document text
    • https://papuwupiruji.weebly.com/uploads/1/3/4/3/134348025/kuwadevujudeti_fetugopijexodi.pdfIn PDF document text
    • http://sethel.xyz/mivarusuzunonamarenklp0a.pdfIn PDF document text
    • https://cdn.sqhk.co/letonolomo/1AeyggV/xepixadavumigegumawek.pdfIn PDF document text
    • https://wutusexiradolo.weebly.com/uploads/1/3/0/9/130969471/wixat.pdfIn PDF document text
    • https://vawalebadafi.weebly.com/uploads/1/3/4/6/134660315/9790211.pdfIn PDF document text
    • https://robesiladobaluj.weebly.com/uploads/1/3/0/8/130813577/diragusoxibogi.pdfIn PDF document text
    • https://kufidadifijerid.weebly.com/uploads/1/3/1/4/131407945/gadasamuveg.pdfIn PDF document text
    • http://wesaremujoworu.22web.org/gotranscript_audio_test_answers_december_2018.pdfIn PDF document text
    • http://damvglaz1.xyz/leetcode_pythonpp9u2.pdfIn PDF document text
    • https://lukozosa.weebly.com/uploads/1/3/4/4/134485969/pojijiki.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pezofut/xavitakekolew.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/moonkin_pvp_guide_3._3_5.pdfIn PDF document text
    • http://kixajek.epizy.com/dockets_dying_light_guide.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_off0000b2c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2C2 5828 bytes
SHA-256: c5c7df0e5c0613dedec26c5c8b22c4d226b1d56e5283c031b79c8f531ab15163
font_01_sfnt_off0000c68c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC68C 9684 bytes
SHA-256: 93ff74e6eb3e58ff9124ddbd2c6e6c899adf4092f3b5c1576a97b5f8712a5d6d