Malicious PDF — malware analysis report

Static analysis result for SHA-256 22cefbd351685ad1…

MALICIOUS

PDF

63.8 KB Created: 2021-02-19 16:22:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 9e9bcfb784e6325cd97ed03745d8e9e4 SHA-1: 2e64ed4c6de00f5a91ac54c4b35740812a6eb9c8 SHA-256: 22cefbd351685ad1caf38cd623effebde528b6c9f09d7241f198e1b9b942765f
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/wix?keyword=rate+my+professor+sdsu In PDF document text
    • https://cdn-cms.f-static.net/uploads/4404515/normal_6010a6401f2d9.pdfIn PDF document text
    • http://wukixijolori.iblogger.org/92647790714.pdfIn PDF document text
    • http://zuvakaxosamota.22web.org/ledalesi.pdfIn PDF document text
    • http://xezobezidaro.22web.org/kenmore_front_load_washer_and_dryer_pedestals.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469116/normal_601739484d9d3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://palilipuxajiko.rf.gd/wuwus.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/19946445923.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/monthly_budget_templates_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/sejakopa/nachiketa_new_song.pdfIn PDF document text
    • http://gojaxuga.epizy.com/voodoohda_2._8._4.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/53784889326.pdfIn PDF document text
    • http://fofiwufawiparug.epizy.com/project_interdependency_mapping_template.pdfIn PDF document text
    • http://tuzotulerijenej.rf.gd/vevekimuvofapo.pdfIn PDF document text
    • http://banugigo.epizy.com/great_answer_to_what_are_your_weaknesses.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/zozimerolokuzubaxuki.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/does_a_residential_lease_agreement_need_to_be_notarized.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_off0000c004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC004 5264 bytes
SHA-256: 2117b2726117b6f0ce4bd154237c74b1afaf4ef58b21f69881cb0fb224dfc542
font_01_sfnt_off0000d1e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E7 9544 bytes
SHA-256: 57981a9a2e0bac3755c430f2656db031903a31ac47d05a14e8709ca39c2e24e7