Malicious PDF — malware analysis report

Static analysis result for SHA-256 34a27e0bf9f834ce…

MALICIOUS

PDF

72.2 KB Created: 2020-11-18 05:52:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 5f0341abe56fcacb1a6903dde113cdc5 SHA-1: 2fcddb74a36a3fb0639701eb602c2cef6538497f SHA-256: 34a27e0bf9f834ce1e736aaf7d962ab87de122f7234760eacca41e99f79b3f93
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, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO spam campaign. The embedded URLs point to various domains, including weebly.com and s3.amazonaws.com, which are commonly used for hosting malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

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://traffnew.ru/123?utm_term=pierce+the+veil+band+members+tattoos PDF link annotation
    • https://wegotutitupal.weebly.com/uploads/1/3/1/4/131453182/mabesofipuwi_bekoxubuwaje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378620/normal_5f8a65fd918cd.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/9750708.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/degekofosekexatevux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383695/normal_5fa07e8eedb8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410415/normal_5f95548a242c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366400/normal_5f877c2320fa8.pdfIn PDF document text
    • https://sitegevom.weebly.com/uploads/1/3/4/6/134664280/fojalotanaviz_ximiwawu_remenizot_pinivemiti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370089/normal_5f8e987aaf463.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/baposivarabuj/boneworks_vr_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wepeliniru/mount_saint_john_ohio.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/fun_games_unblocked.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/kisuvili.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/85661800075.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDD9 5168 bytes
SHA-256: ac6a1aac1d749984164b2b7e20feb21a16b81d5665d4e234008c9914defe6285
font_01_sfnt_off0000df2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2C 11208 bytes
SHA-256: 4ee08614f0e3d7a60bc0a8b4df717973a12a86c92471c308ca1dc2908448dbee
font_02_sfnt_off0001054c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1054C 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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