Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e6d21e49642ac51…

MALICIOUS

PDF

75.5 KB Created: 2021-06-01 00:11:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 4a0c35c95445d3573fcdb09965cd4a66 SHA-1: b15ef055fcfca2395781cc8ca8e4a7cb2bcc3c7d SHA-256: 2e6d21e49642ac51bd276d2976e5d2e08858b7a530fa2859616c43d3d942415f
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The presence of a URL with 'hd video converter to mp4 apk' in the query parameters indicates a lure for potentially unwanted software or phishing. ClamAV and ML heuristics confirm the malicious nature of the PDF, likely serving as a dropper or redirector.

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://botokaw.ru/123?utm_term=hd+video+converter+to+mp4+apk PDF link annotation
    • https://tarakemutelomul.weebly.com/uploads/1/3/2/3/132303353/xemamarer_nuponiwese_woxesedifejo_sejajo.pdfIn PDF document text
    • https://faloxumotib.weebly.com/uploads/1/3/4/6/134646793/9595746.pdfIn PDF document text
    • https://dinufipaxa.weebly.com/uploads/1/3/4/4/134440308/joral-sawoj-lonujiniro-polukur.pdfIn PDF document text
    • https://zepemotofilizag.weebly.com/uploads/1/3/5/3/135399015/migagumokuti_xulujuk_raponefeduli.pdfIn PDF document text
    • https://jenodaxadow.weebly.com/uploads/1/3/4/0/134012655/tusize_tugobazuwuwo.pdfIn PDF document text
    • https://ladipepisosixas.weebly.com/uploads/1/3/4/8/134898905/22d25a26d6c42.pdfIn PDF document text
    • https://jefupijoban.weebly.com/uploads/1/3/1/4/131437873/5eda5eb.pdfIn PDF document text
    • https://doxeraja.weebly.com/uploads/1/3/1/8/131871607/fe90a7.pdfIn PDF document text
    • https://monotuwisax.weebly.com/uploads/1/3/4/5/134589760/756b21dc1ecc.pdfIn PDF document text
    • https://difodofixipa.weebly.com/uploads/1/3/0/8/130814112/1961527.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://palixazoke.pbworks.com/w/file/fetch/144428169/do_i_need_a_doctors_note_for_maternity_leave.pdfIn PDF document text
    • http://rimogeto.pbworks.com/w/file/fetch/144427854/29844620928.pdfIn PDF document text
    • http://jajafad.pbworks.com/w/file/fetch/144428400/delta_skylar_crib_manual.pdfIn PDF document text
    • http://wuvebag.pbworks.com/w/file/fetch/144428376/99867638851.pdfIn PDF document text
    • http://lekipirunezi.pbworks.com/f/my_boy_emulator_apk_ios.pdfIn PDF document text
    • http://lekipirunezi.pbworks.com/f/voice_lessons_syntax_answer_key.pdfIn PDF document text
    • http://xuruzinijub.pbworks.com/f/55962770416.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eaf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF2 5180 bytes
SHA-256: d500fa01f873bc3b79e63517f72b6ab59b979d1ee6160d9e86af52921622dc00
font_01_sfnt_off0000fc88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC88 10772 bytes
SHA-256: ff0a2db39994968dd7b26694481a0cba8b01b7c51ed7b54e1f7a60b87b529605

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