Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fb2ef83a9a09121…

MALICIOUS

PDF

69.5 KB Created: 2021-02-18 20:58:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 0cf3d49f5943fdaf494b69beb26a2e06 SHA-1: a87ef663d3a23ada00ee07139aa54bdfd3d95e9f SHA-256: 0fb2ef83a9a09121a16c34924cca1706e30955f05bae4fb3348356fae60c2686
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wb?keyword=how%20long%20to%20leave%20splat%20in%20hair In PDF document text
    • https://static.s123-cdn-static.com/uploads/4495043/normal_5ffe6f09ea8d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467043/normal_600ad97a2795a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488582/normal_602058c18db0a.pdfIn PDF document text
    • http://ninujovapazolo.iblogger.org/surat_yasin_latin.pdfIn PDF document text
    • http://xakojudanek.66ghz.com/irish_flute_music.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474450/normal_601fa1cf22360.pdfIn PDF document text
    • https://cdn.sqhk.co/womibakok/VUH32Pl/family_pic_one_word_caption.pdfIn PDF document text
    • http://fitnesspack.net/trigonometric_function_graphs_worksheet7nzwm.pdfIn PDF document text
    • https://cdn.sqhk.co/suxupijisajo/gjiMhaV/power_rangers_legacy_wars_free_redeem_codes.pdfIn PDF document text
    • http://jedugefipevama.iblogger.org/22363481953.pdfIn PDF document text
    • http://rigipufefe.iblogger.org/wapking_new_ringtone_2018.pdfIn PDF document text
    • http://ecosbor.net/why_is_my_computer_not_charging_when_plugged_inshzom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503787/normal_600be15b3ba76.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455183/normal_6007aa3d5b4ee.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kewugozosefo.epizy.com/beginners_guide_to_fishing_equipment.pdfIn PDF document text
    • http://jegelafaxorew.rf.gd/65121384052.pdfIn PDF document text
    • http://fepesori.rf.gd/95542099884.pdfIn PDF document text
    • http://wimifus.rf.gd/revodexunegurogorodoxudu.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_off0000d3f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F6 5192 bytes
SHA-256: 361336927b93482379f94a44d30c6376dfde4c7f445c87039f2c8470dd1d3d57
font_01_sfnt_off0000e5b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B6 10348 bytes
SHA-256: 0606cb12be1a4515fa779daaa94ba427f113d9aac694393f765c88f5884f87cd

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