Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d521e35c5157d5c…

MALICIOUS

PDF

70.9 KB Created: 2021-02-27 11:33:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 11336d83c08c61b33a45d6c309560870 SHA-1: bb3dc1b739b6fd08b206c7a786db31e00238f7fd SHA-256: 2d521e35c5157d5ce9f7617bfd5cc926552ea5ede6dc8309af79daaeb394b21f
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/wix?keyword=embryological+development+worksheet+answers PDF link annotation
    • https://wetusaseri.weebly.com/uploads/1/3/5/2/135297966/6578877.pdfIn PDF document text
    • http://gigojosok.22web.org/methoxyfenozide_data_sheet.pdfIn PDF document text
    • http://dududuw.mypressonline.com/wunavaza.pdfIn PDF document text
    • https://kufojomarolov.weebly.com/uploads/1/3/4/4/134401526/4b6db6d409df3.pdfIn PDF document text
    • http://avbox.org/37339160173qw7cb.pdfIn PDF document text
    • https://pinozawekik.weebly.com/uploads/1/3/4/5/134589254/f32e46fe1283d.pdfIn PDF document text
    • https://pojekemo.weebly.com/uploads/1/3/4/4/134469054/0f7ab0a57ab7df4.pdfIn PDF document text
    • http://kirakexig.mypressonline.com/27749838319.pdfIn PDF document text
    • https://wefogazasu.weebly.com/uploads/1/3/4/8/134880183/8702072.pdfIn PDF document text
    • https://nubavusixid.weebly.com/uploads/1/3/5/3/135348304/gubetepag.pdfIn PDF document text
    • https://sejexogubason.weebly.com/uploads/1/3/1/0/131070030/4315df6d44c1e41.pdfIn PDF document text
    • https://ziwolowuwuxux.weebly.com/uploads/1/3/5/3/135321756/4785663.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://suwazepomigu.epizy.com/88714842154.pdfIn PDF document text
    • http://ginowane.onlinewebshop.net/how_to_use_prayer_beads_pagan.pdfIn PDF document text
    • http://fobuzepiru.epizy.com/chevrolet_aveo_2013_ls_manual.pdfIn PDF document text
    • http://vubelifijam.atwebpages.com/ao_del_modelo_atomico_de_dirac_jordan.pdfIn PDF document text
    • http://jebufatibakuv.epizy.com/jj_benitez_caballo_de_troya_3.pdfIn PDF document text
    • http://mirepili.epizy.com/quadratic_applications_worksheet_answer_key.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_off0000d761.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD761 5900 bytes
SHA-256: 986cccc6508018859350f8f81e2f91689ef200667274ebee1efdb5dfc3071f36
font_01_sfnt_off0000eb68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB68 10316 bytes
SHA-256: c72e192483947e5eb449ebb7883665dbedb60b079adbe4fb81c0b4ca506c4fd7