Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b3cd9126b912a6d…

MALICIOUS

PDF

78.0 KB Created: 2021-05-20 05:10:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5b93bbca708426ec1e0f2d5647a69762 SHA-1: 564d2efcc913c71be743446994a085e041607fc0 SHA-256: 9b3cd9126b912a6dd4484f1c1e7d2e0b52bca48e21bcbab4142621a930617027
156 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 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 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://nipisod.ru/strik?utm_term=background+powerpoint+tentang+sejarah PDF link annotation
    • https://mizefubu.weebly.com/uploads/1/3/4/6/134637235/lawep-pekemutabapeku.pdfIn PDF document text
    • https://sobexezawatu.weebly.com/uploads/1/3/4/9/134903145/7883443.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425921/normal_5fdde7bb531da.pdfIn PDF document text
    • https://dakikizubebara.weebly.com/uploads/1/3/4/8/134889455/3eb4f55a67a7d99.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449177/normal_5fdf35d3870b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459784/normal_6050f69fb786e.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/pululusodogi/dell_e6410_wifi_drivers_for_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/158153672.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/65163439897.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/sample_conclusion_in_narrative_report_for_ojt.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/golf_swing_tempo_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/gekonarudetir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c55c0fe-0a9d-4204-97a2-7290bb6a88cf/57146745888.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/77796900292.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/songs_that_bring_back_memories_2010s.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/duzetugivawirivolaxosifi.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/mizurumijowed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27f6461e-6926-4aa2-9d81-88ee95e57efd/67949569037.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3a2581d-e0d3-4be0-94b4-5d9c5cfc3649/buxovitelelewodig.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/joradugitepekasupirel.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF426 5584 bytes
SHA-256: 67438f1795795932d02b8d7c36e598f7a4c507f43c98b7756ffcd36c8b784b0b
font_01_sfnt_off00010741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10741 10476 bytes
SHA-256: ca49834cd9791076d5b480aeaff4debdf427ed83f3e6510952252febb2cb013b

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