Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf9d6890c8d49fb9…

MALICIOUS

PDF

76.3 KB Created: 2021-03-23 18:26:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c19b6ed306234bde657b603b3a1b2c86 SHA-1: 5f287d186f38a046e5c58b866ac34bd20441d618 SHA-256: bf9d6890c8d49fb9af2fba3aecd1c45c7de8942bc9369dabf61e13119c1f667f
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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/strik?utm_term=john+deere+lawn+tractors+sale+canada In PDF document text
    • https://cdn-cms.f-static.net/uploads/4459177/normal_6059677126da2.pdfIn PDF document text
    • http://vabenawak.iblogger.org/55903584610.pdfIn PDF document text
    • http://zujadise.scienceontheweb.net/zudosavuj.pdfIn PDF document text
    • http://tikukef.22web.org/dd_5th_edition_planescape.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470832/normal_5fd7dfe59caa1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387244/normal_5fe2bdc955e8c.pdfIn PDF document text
    • http://xujadawowupu.scienceontheweb.net/retogonaporoluzikab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/sony_str-k750p_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/napuvulobitin.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/wamanabutevupexop.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/marshall_avt150_valvestate_2000.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/china_post_tracking_code_format.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/admissions_coordinator_interview_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0593fa05-8054-4641-9f60-5bb5a1d7e0c1/what_does_seeing_the_number_800_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc502dfc-0e3b-459b-a10e-1b2125e207fa/14119514971.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/project_management_professional_pmp_salary.pdfIn PDF document text
    • http://puwasoru.rf.gd/color_theory_in_photography.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/en_la_mitologa_griega_dioses_del_inframundo.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_off0000ec98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC98 5108 bytes
SHA-256: b9a9db0df74e74ed5d3948a2a30eaaef9e91070bfa149610bd05452769929ca7
font_01_sfnt_off0000fe01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE01 11208 bytes
SHA-256: 25689a84c95232c0084b50fb34654abd2eb8c6c06be0f4e3ff630dda2ee8c8de

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