Malicious PDF — malware analysis report

Static analysis result for SHA-256 19950970808831bd…

MALICIOUS

PDF

77.5 KB Created: 2021-03-01 08:52:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 872c599351eeecbc93f9e7b4f760a20a SHA-1: f3f67b822b77ca73ee685af3c0a07e239c2fabfe SHA-256: 19950970808831bd6af2def842ec13cb78f1053da7843277c2ee139e75a7c84a
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 0.9998

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://druttle.ru/wix?keyword=2.2+instantaneous+velocity+worksheet PDF link annotation
    • http://zesepajokab.22web.org/97145286197.pdfIn PDF document text
    • http://xotekalulomeb.iblogger.org/how_to_use_a_solubility_curve_to_determine_saturation.pdfIn PDF document text
    • https://bebejumupetokox.weebly.com/uploads/1/3/4/5/134513190/6947841.pdfIn PDF document text
    • https://jibajupo.weebly.com/uploads/1/3/1/6/131636806/varuriwezubafijana.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/roware/kemut.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/magnetic_levitation_train_seminar_report.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/pepole.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/fitosetopuk.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/arduino_joystick_shield_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/aggiornare_contatti_whatsapp_android.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/liralevowopixonebonifonir.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/58432673891.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_off0000f3ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AD 5272 bytes
SHA-256: 4816aacab20f0b195de3db9ee6f12fe23c012a6d8eb5d139f23f6d2f8fbd156e
font_01_sfnt_off000105b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B7 10268 bytes
SHA-256: c161306b47bd203faa39fd2ce9b1bfae1b1f613df2a6808ff77670a2ca6785cb

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