Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa9117ddb0822326…

MALICIOUS

PDF

75.5 KB Created: 2020-12-19 17:32:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 26c65b5f42e2bdec5a3936acbcbcad28 SHA-1: cb092a8f11a63302d85d74af7adc067247aa544b SHA-256: aa9117ddb08223265e07ce77df5ceab6e436a4568f9c7198377523aeaee10386
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a link to a known malicious redirector, indicating a phishing attempt. The embedded URL is disguised as medical guidelines to entice users to click. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://traffmen.ru/aws?utm_term=kidney+transplant+rejection+treatment+guidelines In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388165/normal_5fd9bc3546a78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452217/normal_5fd2e658a95c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382430/normal_5fc8cf816a385.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457560/normal_5fccee1299887.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465142/normal_5fdcd153098fa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481990/normal_5fc62a71e0d6d.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/dugibabafod/sukemozaka.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/my_baby_she_wrote_me_a_letter.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc56016a13a450bab124a3f/t/5fcf7a3f64290b1c3dd91ccb/1607432767762/aafes_furniture_store_schofield_barracks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70e4916b-b3c3-4e27-8772-8d10f0e38ca9/49263959059.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80861e4e-e0f4-4bc7-af66-fb60155a65f8/49610793970.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/131258504.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b104cbb-2b1c-4641-9431-daa583c7a58e/45483148364.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/855b8030-0ef1-4134-a309-a3033352949b/lesejizawubu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e90dfd2-676e-4c51-92bb-ebfa65205e83/manual_tecnico_wisc_iv.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD222 5540 bytes
SHA-256: d2b43757c0a966b6f79ab9ddd76ef9c0638e17d02f2e14220a52474e07773abd
font_01_sfnt_off0000e4fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FA 11276 bytes
SHA-256: f8297f702e8e7def7058ecfaecd51be202e8e2fb6e04978c2af807c94f0ff2d2
font_02_sfnt_off00010afa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AFA 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501

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