Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f4a950b4b58e841…

MALICIOUS

PDF

73.7 KB Created: 2021-03-22 03:08:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 38a06f5cf8a7a7d13c4fd68d128a010f SHA-1: 882def93639892d7b806adcc6f1a7f589bede24f SHA-256: 7f4a950b4b58e841bd193367ba530e60160f14313f372028ea26e3a0a73526d7
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://gimoguvi.ru/strik?utm_term=bill+mollison+permaculture+a+designers+manual+pdf+free+download PDF link annotation
    • https://zuriloteva.weebly.com/uploads/1/3/4/6/134623588/rorubara_bevel_zizutoju_livusilanujugew.pdfIn PDF document text
    • https://xopugexufejan.weebly.com/uploads/1/3/4/7/134709921/5592125.pdfIn PDF document text
    • https://wimazuwog.weebly.com/uploads/1/3/0/7/130740080/b331fdec83267f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/41632130-265b-426f-813a-aea7f9ea7641/36732535168.pdfIn PDF document text
    • http://mixonanax.epizy.com/77832042116.pdfIn PDF document text
    • http://bufezesaj.epizy.com/riveti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b473d96c-00bc-4857-9588-3d5eccdd462f/husqvarna_rz4623_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/fozex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87a18b9a-b5c5-4de9-9385-058dfb029952/what_is_f_periodic_table.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/74100745930.pdfIn PDF document text
    • http://tededuliwe.rf.gd/vilebotesob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/843bbbd3-bbd5-4f7d-b250-28e348d80016/22621747371.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/what_are_the_goals_of_strong_writing.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/better_business_bureau_phone_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f4e534f-b4b8-45b9-9682-35751c61f982/acer_laptop_buy_india.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/amazon_software_development_manager_technical_interview_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4769ce3c-e4e2-4119-ab8a-5d570ff8d493/naxisonidebozeji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67923c63-1134-47bb-906a-e07288c11ade/pujivivizofifizurexufapo.pdfIn PDF document text
    • http://tazolomepupota.rf.gd/church_trustee_report.pdfIn PDF document text
    • http://wuzisop.epizy.com/kiwowifetinafixa.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD356 5500 bytes
SHA-256: 856687de09cb1b478148a9b7c089e5e85b35804686f3fb5ae73c7a7172030489
font_01_sfnt_off0000e5fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FA 10616 bytes
SHA-256: 03c6277882590531677051d693d0077f87f11bb2667be9c83cb3f2688e1800da
font_02_sfnt_off00010a44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A44 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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