Malicious PDF — malware analysis report

Static analysis result for SHA-256 610f633382f67f3b…

MALICIOUS

PDF

72.0 KB Created: 2021-03-01 15:39:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 25c90bb767c6649418ce98f27574310c SHA-1: 96ba6735a108fb3086854ff185656eaf2bcdd070 SHA-256: 610f633382f67f3b2a7f27c00e99717874c7fd56a31a58c198f56d49be796466
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=skills+worksheet+science+skills+slope+of+a+line In PDF document text
    • http://xovekofetovo.66ghz.com/6743671929.pdfIn PDF document text
    • https://cdn.sqhk.co/nixenexax/jehaeje/indoor_archery_world_cup_2017.pdfIn PDF document text
    • http://optalpha.com/jaxorobegivim0leo9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404953/normal_603361c2bb2a7.pdfIn PDF document text
    • http://blablablacar.online/22297607963l26f0.pdfIn PDF document text
    • http://spindlndou.space/botonumepewenisiecs2c.pdfIn PDF document text
    • http://nibelv.xyz/75493976490j77x6.pdfIn PDF document text
    • https://cdn.sqhk.co/vatomepipiw/fkmIOBU/kudimonarofofuluxasaguw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383688/normal_601529442bbf3.pdfIn PDF document text
    • https://cdn.sqhk.co/kokademesuz/iihokHV/jagajanumudimiwogi.pdfIn PDF document text
    • https://cdn.sqhk.co/busoleva/gd2idhd/hello_neighbour_act_1_house.pdfIn PDF document text
    • http://topstop.site/inochi_no_namae_sheet7h3wd.pdfIn PDF document text
    • http://damvglaz6.xyz/pulse_ox_levels_covidzp6h2.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_off0000de62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE62 5364 bytes
SHA-256: 88f9e50bee9ddbb6399015ec0ec403a2b0074c5b616fcce1d536de4c6ef83b87
font_01_sfnt_off0000f0b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B2 9940 bytes
SHA-256: 4e05996d8201543d7c57cff5175bc4127f5b0a32401e11f7a1d57d24d0048293