Malicious PDF — malware analysis report

Static analysis result for SHA-256 35457c59879e1bda…

MALICIOUS

PDF

68.0 KB Created: 2020-11-10 02:27:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 7b813299150ca9d1705b89203e9ea3b1 SHA-1: 9692b1abf0d99c9fee0094def0381fff5f46819c SHA-256: 35457c59879e1bda23c50c5acdd6672c94a7d147899c1cad1eed91f62851a3b1
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

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://traffine.ru/123?keyword=wwsd+2020+barrel PDF link annotation
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/63d400e.pdfIn PDF document text
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/zegolanizu-bilefatesab-koxolez.pdfIn PDF document text
    • https://junoxavod.weebly.com/uploads/1/3/1/3/131384771/xupomawogupum.pdfIn PDF document text
    • https://wekowemawifov.weebly.com/uploads/1/3/4/2/134266616/jedinuv.pdfIn PDF document text
    • https://kisotupojez.weebly.com/uploads/1/3/4/4/134493444/fewev_nawadofaxusi_lifezamego.pdfIn PDF document text
    • https://bavejojonosepes.weebly.com/uploads/1/3/1/3/131380601/lirerezukerapuka.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/wonoti/tapagake.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/paradise_lost_book_1_summary_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/544a9d15-801a-4d1c-a505-6b00c7b4e8e3/volume_by_cylindrical_shell.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/86512869048.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/zufufejavosoxasunosape.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6087de50-e8e7-4032-806f-e1cd73f91a44/42187492257.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/murder_mystery_2_codes_2019_wiki.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/online_arabic_font_generator.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_off0000cdcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDCB 5336 bytes
SHA-256: 4e5e62b2ba3ec77eef27b0b100a361138bbd8e181a4984e4bdb93f971b97b0c3
font_01_sfnt_off0000e00f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00F 10392 bytes
SHA-256: 164df0abc99825e19b9a86e9d9fe202b18ff259e0cd0d39250e53dba95b89306

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