Malicious PDF — malware analysis report

Static analysis result for SHA-256 18e366d6735f8efa…

MALICIOUS

PDF

72.1 KB Created: 2020-11-10 10:24:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3f30c24b937f411f2654d9b8fab034ad SHA-1: d9b6a835c39c528db9cfd125aad012b120600338 SHA-256: 18e366d6735f8efaaf76455862c27a2b9756ed58125fc6a3aece6970088c192a
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 0.9997

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 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://trafficel.ru/123?keyword=short+school+christmas+plays PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369633/normal_5f89269cd4898.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412379/normal_5fa6106aa90ef.pdfIn PDF document text
    • https://jusopusoguwukul.weebly.com/uploads/1/3/4/4/134494455/tetafas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379615/normal_5f9435f51781d.pdfIn PDF document text
    • https://lonodoxelu.weebly.com/uploads/1/3/4/3/134305804/xafog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387920/normal_5fa27e81a87ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386337/normal_5fa3cae79d097.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413012/normal_5fa60eda79403.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/liwafo/north_carolina_school_of_science_and_mathematics_ranking.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/blood_on_snow_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/zukukelejurotef/bunadomokabonegi.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/foladodakuwalifotadefor.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/advantages_and_disadvantages_of_artificial_intelligence.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/amphoteric_hydroxides.pdfIn PDF document text
    • https://s3.amazonaws.com/pukasojalu/money_hack_for_pixel_car_racer.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_off0000dc92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC92 5376 bytes
SHA-256: d70a319206d2ae68c512656c9f534db69d258e6516b3b6227ff080846056dc78
font_01_sfnt_off0000eeba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBA 11100 bytes
SHA-256: aca53655b84b9d784d58df4ae2f5ae2336d5a47d8350fe02223eab6a11b95f42

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