Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b57b01934a03eed…

MALICIOUS

PDF

71.6 KB Created: 2021-01-23 00:19:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: aa12df50becb09b0234264117179fb72 SHA-1: be838673d3ec96abe26f959385ec0c8bcbe5f402 SHA-256: 3b57b01934a03eed905c072ae110e6a67357c706d8b11d245a594e744e882046
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://yafferge.ru/wb?keyword=download%20pocket%20rally%20lite%20unlimited%20money In PDF document text
    • https://site-1178687.mozfiles.com/files/1178687/100_doors_floors_escape_level_53.pdfIn PDF document text
    • https://site-1167951.mozfiles.com/files/1167951/kung_fu_zion.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxuvedije/3GKhgje/90228075477.pdfIn PDF document text
    • https://cdn.sqhk.co/munuluxel/8pdWRAy/brimming_synonyms_words.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371800/normal_600a1ce3d323c.pdfIn PDF document text
    • https://site-1172464.mozfiles.com/files/1172464/bkash_account_opening_form.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420903/normal_5fe78b7687b1d.pdfIn PDF document text
    • https://cdn.sqhk.co/wapadofiwe/jj0yLhj/64517475984.pdfIn PDF document text
    • https://cdn.sqhk.co/kepilujofeje/hdZbsCZ/masut.pdfIn PDF document text
    • https://cdn.sqhk.co/zewesifadeka/eibChjl/85257129827.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426280/normal_5fc97ab76bf17.pdfIn PDF document text
    • https://site-1178186.mozfiles.com/files/1178186/pixevizegikatifavel.pdfIn PDF document text
    • https://cdn.sqhk.co/puvegipuros/6Gia4rx/revapenur.pdfIn PDF document text
    • https://site-1235963.mozfiles.com/files/1235963/easy_english_short_stories.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gotuziput.epizy.com/sovasusebidinexujaforaw.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_off0000dae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE3 5300 bytes
SHA-256: b2efe3dc2459a0214dc7843d490dde46920e4f2cd77a08bbeda6885a15da0e53
font_01_sfnt_off0000ecf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF6 10624 bytes
SHA-256: df84429e3998490e9b310d58ec571cce2a6275d8d5dd45137c8fc2e75ee1e788