Malicious PDF — malware analysis report

Static analysis result for SHA-256 2826b8e8c2751c8e…

MALICIOUS

PDF

72.5 KB Created: 2021-02-26 00:30:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 2d16e4c4fa8a5911fd969f697018af08 SHA-1: 1ab4af586ef983cb5a4f4243e1ac211e76a77ec3 SHA-256: 2826b8e8c2751c8ef6bd4d8de78f2656342dd00b2ab3bd617c26f2589cc6db99
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://maypoin.ru/award?keyword=how+do+matter+and+energy+move+through+an+ecosystem PDF link annotation
    • http://magnifioco.site/nagakigetw75j.pdfIn PDF document text
    • https://buvelixajotoneb.weebly.com/uploads/1/3/5/9/135982000/5346434.pdfIn PDF document text
    • https://ritixalasan.weebly.com/uploads/1/3/4/2/134265532/zaxoroluk.pdfIn PDF document text
    • http://limevekobo.iblogger.org/94988506584.pdfIn PDF document text
    • http://secureappeal.com/80322647267ekdfq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476133/normal_601a7eadc1981.pdfIn PDF document text
    • http://scm03.ru/18957874506sj92y.pdfIn PDF document text
    • https://xaduregenotilok.weebly.com/uploads/1/3/4/7/134711203/87300ba63de.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494452/normal_5ff65136e2a9e.pdfIn PDF document text
    • https://cdn.sqhk.co/tubadaluzafu/Nghp3jN/best_stickers_for_snapchat_group_chats.pdfIn PDF document text
    • http://repair-kompov.ru/list_of_fairy_tales_storiesbacot.pdfIn PDF document text
    • https://cdn.sqhk.co/filomada/mYhaUgg/73115638151.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447258/normal_5ff21a315b36a.pdfIn PDF document text
    • https://zizusufake.weebly.com/uploads/1/3/4/6/134646877/nonedumi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388814/normal_5fe4d2acde14e.pdfIn PDF document text
    • https://gilawidukawopux.weebly.com/uploads/1/3/2/7/132741225/9959703.pdfIn PDF document text
    • https://wobelafesuta.weebly.com/uploads/1/3/4/7/134767333/xiwafavaker.pdfIn PDF document text
    • https://newakikijako.weebly.com/uploads/1/3/4/3/134351088/9603421.pdfIn PDF document text
    • https://cdn.sqhk.co/wumerelup/96jegh7/pentagon_federal_credit_union_refinance_mortgage_rates.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000df5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF5C 5536 bytes
SHA-256: 1ace25e03b838b6f9120dbec81c1c99ca571b0cae7d676ab3ac6c71c0bd39e58
font_01_sfnt_off0000f21b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF21B 10072 bytes
SHA-256: eec3fcc0bac6c51b61e20c681bcb9578e547f4826357bc75329085119d207648

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