Malicious PDF — malware analysis report

Static analysis result for SHA-256 04cd1d5d94973f02…

MALICIOUS

PDF

70.5 KB Created: 2021-01-06 21:12:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: e4563ed12c90dc24e609fe3fc349d902 SHA-1: ec3e52039b7e2f788e7deac124a96eb9d6814de3 SHA-256: 04cd1d5d94973f0221d58e1054b851b58a55382d94e606ac87071a7e7a1a56e6
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or phishing campaign. The heuristic PDF_SEO_LINK_FARM specifically flags this behavior, indicating a large number of external links. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution via these external URLs.

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://traffking.ru/aws?utm_term=convert+jpg+to+excel+spreadsheet+online PDF link annotation
    • https://garegijewavib.weebly.com/uploads/1/3/4/3/134389285/rumotatodoli.pdfIn PDF document text
    • https://gedevuxezupimot.weebly.com/uploads/1/3/4/8/134884710/jetimefa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366044/normal_5f9525e649271.pdfIn PDF document text
    • https://kidivine.weebly.com/uploads/1/3/4/5/134576756/weribare_jabirosu_zosuvotizenoxab_rofafu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407084/normal_5f9a53bc767dd.pdfIn PDF document text
    • https://cdn.sqhk.co/jaguwubax/gh6tqVS/getazolewapobuvud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374838/normal_5fbd4b4e6092c.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/gedesisumi/zezusejanezitumex.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/vscode_php_formatter_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/small_pro_full.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/9628066984.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/planimetria_catastale_non_conforme_proposta_di_acquisto.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/aristteles_tica_a_eudemo.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 4

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_off0000d523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD523 5444 bytes
SHA-256: 7b136ea872790146c0f03f700a25fddc17017d59fbf095391bb8fde83a2cae6f
font_01_sfnt_off0000e7af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AF 10932 bytes
SHA-256: 00d482c33705a6463461ab3edb43378a939f53482d478dea5ad67e3f74e9efca

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