Malicious PDF — malware analysis report

Static analysis result for SHA-256 725178faa5c79b87…

MALICIOUS

PDF

66.8 KB Created: 2021-03-03 05:03:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 6115889a713481686c7f02d7b5927e63 SHA-1: eb1aedd45ce949889943847167adba6d1c6eecf5 SHA-256: 725178faa5c79b87a7a499ffd05bd756a9433d9faed5b4d8a93a69ea05bcf66d
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://druttle.ru/award?keyword=ashrae+handbook+2019+pdf PDF link annotation
    • http://all-system7.club/11997765520kwe1u.pdfIn PDF document text
    • http://ogranicbio.fun/lisukikadegodadijolaxigo775sq.pdfIn PDF document text
    • https://xuzizalebu.weebly.com/uploads/1/3/4/7/134772475/sedarelojilar.pdfIn PDF document text
    • http://servempieza.site/what_are_the_cycles_of_water0a2si.pdfIn PDF document text
    • https://vofitusu.weebly.com/uploads/1/3/5/3/135301199/wepakozidoxari-wofimesonef-buxebivifij-mininawer.pdfIn PDF document text
    • http://nakalabaxis.mywebcommunity.org/xelupidofogubaxi.pdfIn PDF document text
    • https://sukaxivex.weebly.com/uploads/1/3/4/8/134895869/c0ceabb9.pdfIn PDF document text
    • https://lozugukavokukes.weebly.com/uploads/1/3/4/3/134357100/depujojofozo.pdfIn PDF document text
    • http://kayikciakademi.com/sujupagukojakgrsn0.pdfIn PDF document text
    • http://salea.site/xupudexedipodioqnco.pdfIn PDF document text
    • https://federadedeladol.weebly.com/uploads/1/3/4/6/134626130/vufuzumedotonuk-devutiwedox.pdfIn PDF document text
    • http://art-practice.org/aqualung_axiom_bcd_manualtb4jd.pdfIn PDF document text
    • http://arm-watch3.club/dual_hub_dmvpn_design_guide99jtn.pdfIn PDF document text
    • http://artistichomesolutions.com/what_can_1_month_of_gym_donjv19.pdfIn PDF document text
    • http://jakor.pro/fefopukobkb5jt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gikunipif.epizy.com/good_free_powerpoint_templates.pdfIn PDF document text
    • http://garaloxuvenuwin.epizy.com/reducing_fractions_worksheets_5th_grade.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_off0000ca5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA5C 5772 bytes
SHA-256: 870f8ebc75b64e511ac4aa69b10e88f3051e859c4f87e7f527ac4fdf061f19cd
font_01_sfnt_off0000ddef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDEF 9500 bytes
SHA-256: edde5d872f32e85edf9c333a5a317a8505170351e3324c82dab45ce88506c1ce