Malicious PDF — malware analysis report

Static analysis result for SHA-256 19c3279d065c9c7c…

MALICIOUS

PDF

73.9 KB Created: 2020-11-22 05:49:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: c8c3c417638cb8aee1980efef9f585fd SHA-1: d7cdf38d653ae66d0b5f33f500371b8fd34d6593 SHA-256: 19c3279d065c9c7c405e743c92d9f3d6ba6dc070e583525f7bcf02ead6763076
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffi.ru/123?utm_term=kvii+weather+forecast PDF link annotation
    • https://lugilabujenubo.weebly.com/uploads/1/3/4/3/134320616/2359dbc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416305/normal_5f977e00b2e98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387928/normal_5f9a6621234f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393358/normal_5f98c86176069.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380881/normal_5fb7f8f8ede52.pdfIn PDF document text
    • https://podosutopo.weebly.com/uploads/1/3/4/5/134590637/dapobis-pesuda-vuvokaz.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/xakapudakadu/solar_pond_pump.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/60393249465.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/felesoxetuleki.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/bubajibuj.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/aprender_a_leer_y_escribir_nios.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/asperges_me_partition.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/botanicula_apk_obb.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/juxunitaj.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/evidence_based_medicine_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/macmillan_exam_skills_for_russia_answers.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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_off0000cbed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBED 5060 bytes
SHA-256: 45bf4693c26cdf45f59add29006334fefafc67f11f537594fc402230bad29721
font_01_sfnt_off0000dd3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3A 12240 bytes
SHA-256: 97abb50843b62772eef5fd0f1b0213b469981d5f39de7bcdbb402f23ef5f0dfc
font_02_sfnt_off00010513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10513 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501

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