Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea7ca9643f0b4535…

MALICIOUS

PDF

69.7 KB Created: 2020-12-20 00:02:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 298cb4d24930d7410f6f3199879a0606 SHA-1: c10b019874d30120cae50bb69b08a673598367e9 SHA-256: ea7ca9643f0b4535c02c0c2f080b44b5abc35ddbfabd29b07b109dd636304c5d
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier, indicating it is likely a phishing or SEO spam document. The presence of numerous external links, including one pointing to known malicious redirector infrastructure (https://ggtraff.ru/123?utm_term=ego+t+ce5+manual), suggests an attempt to lure users to malicious websites. No scripts were extracted, but the PDF structure itself is used to host a large number of links.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/123?utm_term=ego+t+ce5+manual In PDF document text
    • https://nujetamewude.weebly.com/uploads/1/3/4/8/134881912/5667252.pdfIn PDF document text
    • https://sanuvexugivi.weebly.com/uploads/1/3/1/6/131606490/sudigefi.pdfIn PDF document text
    • https://fadibukomu.weebly.com/uploads/1/3/4/3/134310842/3814632.pdfIn PDF document text
    • https://gixisisopovi.weebly.com/uploads/1/3/4/7/134713576/35249.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fdd391cd610986319751208/t/5fde4a3c51a86c1b6c1e134c/1608403517610/viwogevonazofutevoxabig.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezodepugov/convertible_promissory_note_balance_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f99bff2a-1b43-4949-87b1-7f6fae3263d8/31891479494.pdfIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/anonyme_anrufe_blockieren_android.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/canon_scanner_4400f_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd4e2cc8930352d2b365a5/1606241836794/gujoxifaluvuzerazan.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2a507085bf90c0e085fb9/t/5fc48f2ff3de5e49b5f69773/1606717234282/dasowepojuponexirot.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/android_app_developer_jobs_in_karachi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f1f5e71-7b04-4ec5-8860-eb7eff3e8a4a/garmin_910xt_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/45963101995.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/sighted_guide_technique.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d31c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD31C 4928 bytes
SHA-256: e1945c385fd2937333ae5128cc1eb0f589a578497110b756bb04a9f25ab47e17
font_01_sfnt_off0000e3e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E0 11244 bytes
SHA-256: a3dcd54af01f96e5d6c126b1411475241e6b405e7718140c7c88095158110f2b

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