Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea3af0c6c442a1e7…

MALICIOUS

PDF

80.1 KB Created: 2021-03-14 14:41:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 44dc44bb79d7e7c70a283e74e3773adb SHA-1: 184b53b496574eb7fb59a28798cfe2c8fa4540e2 SHA-256: ea3af0c6c442a1e75f86e721542828d0174412c527c7290d6b6638c632964b59
156 Risk Score

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 0.9996

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/123?utm_term=bearded+dragon+care+sheet+lllreptile PDF link annotation
    • http://tunabamilusi.mypressonline.com/polycythemia_causes.pdfIn PDF document text
    • https://cdn.sqhk.co/loboremetoxe/ogfxOii/xabixuzukitovila.pdfIn PDF document text
    • https://wesuzekubiw.weebly.com/uploads/1/3/1/6/131607103/bejepibobasuk-pagugubajipivan-gojaju-muvimomina.pdfIn PDF document text
    • http://mebovedu.getenjoyment.net/alopecia_areata_en_mujeres.pdfIn PDF document text
    • https://suzexefovewav.weebly.com/uploads/1/3/4/6/134640410/8400190.pdfIn PDF document text
    • https://pamigewome.weebly.com/uploads/1/3/4/6/134631685/wuzigebedakanuwap.pdfIn PDF document text
    • http://zivemigidefis.mypressonline.com/80910368694.pdfIn PDF document text
    • https://cdn.sqhk.co/xozawimepod/iaOzge1/calendario_octubre_noviembre_diciembre_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/zebenane/aeojfhi/63007672484.pdfIn PDF document text
    • https://cdn.sqhk.co/woferomot/7NpkgdU/auto_clicker_ios_12.pdfIn PDF document text
    • https://cdn.sqhk.co/bufudoraxala/5Y8Ziic/95504157959.pdfIn PDF document text
    • https://cdn.sqhk.co/bapuxilav/ceifyjf/strikers_1945_arcade_rom.pdfIn PDF document text
    • https://puvomowaja.weebly.com/uploads/1/3/4/3/134318832/legixogogabezomonal.pdfIn PDF document text
    • https://piwaxiru.weebly.com/uploads/1/3/4/8/134882920/dugofer.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://s3.amazonaws.com/fewunadupop/88032610442.pdfIn PDF document text
    • https://s3.amazonaws.com/petubapizo/kukawusufigizuzerolo.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/32598844679.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/58331548556.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/tepuru.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/lenen.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/how_accurate_is_the_smartheart_wrist_blood_pressure_monitor.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_off0000eeb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB1 5172 bytes
SHA-256: ac2a4db0b4f5b9777b1ef0d0d05fa583af4377246743f185f42b39df99ed977c
font_01_sfnt_off00010030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10030 10716 bytes
SHA-256: 57804c92c195ff76616c28684ee74fae5292a88fc7de315d62ed461c4c1fcc8d
font_02_sfnt_off000124b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124B2 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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