Malicious PDF — malware analysis report

Static analysis result for SHA-256 759944cb544430ef…

MALICIOUS

PDF

62.5 KB Created: 2020-12-22 23:05:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: c055ba5f81d9252e45a0394850dce70c SHA-1: 132ec3df715415a2629d112c61bfe31398f21754 SHA-256: 759944cb544430efdc29efb1fdc3b9d78ca66f855308018afdce3162f2919bb3
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, specifically identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, suggests a lure related to job opportunities, aligning with phishing tactics. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to download a second-stage payload or redirect to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gettraff.ru/strik?utm_term=assistant+property+manager+jobs+near+me In PDF document text
    • https://towetebofipu.weebly.com/uploads/1/3/1/4/131437669/7ac1c46e726.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489734/normal_5fe1e8f9cd634.pdfIn PDF document text
    • https://jarofudi.weebly.com/uploads/1/3/1/4/131408364/5fb63ff39.pdfIn PDF document text
    • https://kozenuxifojani.weebly.com/uploads/1/3/4/6/134665776/299334b8e9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408461/normal_5fa09f0d94506.pdfIn PDF document text
    • https://nenodomamik.weebly.com/uploads/1/3/4/0/134095987/notononetorafu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424011/normal_5f990f733e665.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/5fc10c1368612547ed5ef44e/t/5fc51958fa04221c71c226a9/1606752600862/university_of_iowa_scholarships_old_gold.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/19603959826.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/pimebutabe.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/vuxumazivumeginutix.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf591b4e98326c0207baf4/1606375710133/types_of_waffle_flavors.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26b94ce1-6c56-4a06-b6fd-d23c08271015/86182349887.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a19446fe-0962-42cb-838d-c0b96a24d128/libro_de_patologia_oral.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_off0000b67a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB67A 5412 bytes
SHA-256: 6a6466c50bee72ced37e3987cd3584c3c7fc0dcd6ef372517488aff3ffbec262
font_01_sfnt_off0000c8dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8DC 10540 bytes
SHA-256: 6f85cbd09ca0c5bf06050e52e8abe5fe442b24e0e1f00def7d00cd6aa9757b3c

Open this report in the interactive analyzer, or submit your own file for analysis.