Malicious PDF — malware analysis report

Static analysis result for SHA-256 db98641f4e79d42f…

MALICIOUS

PDF

68.2 KB Created: 2020-11-10 04:13:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: fe509069731a89419e7eaf6f411c1b79 SHA-1: d770247133c70eb685bf6036ce3442db2304564c SHA-256: db98641f4e79d42f10799ca42755a1376cfd4d2e2c5ec47b8442ffcefda0cb45
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://cctraff.ru/strik?keyword=fitbit+versa+lite+manual+pdf In PDF document text
    • https://narebojabow.weebly.com/uploads/1/3/4/2/134266185/fenisesolebegine.pdfIn PDF document text
    • https://tumogifizutuvo.weebly.com/uploads/1/3/4/5/134527103/teluvumevipodute.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402032/normal_5f9baaa28e0a1.pdfIn PDF document text
    • https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/7226353.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/lopadivupudexa/webedufenite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f695d7b-466a-465b-b105-06d7ae500f3b/pejaguxorakunugagew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a50e5fa2-512c-452a-8345-0ab50d0dbd19/66577604603.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bb95889-3674-472e-b7f1-9c720d262d57/musculos_que_intervienen_en_la_march.pdfIn PDF document text
    • https://s3.amazonaws.com/tenoxitonipuw/81817286226.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22a4b0b7-32d2-47d2-acdd-2215ea133c7b/19165517274.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8abe3f6-32c8-403a-9863-8b1271e3a1c9/wuzanibem.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB876 5344 bytes
SHA-256: 25cddcd1547668fd4603e7f68deb56a6520ee2d5f0fb53ecab908d268abb27f9
font_01_sfnt_off0000ca92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA92 10048 bytes
SHA-256: 3667f6c0c2ba4b2dbef8f79d44f30938b1500286878b283828704b30e5537038
font_02_sfnt_off0000ed2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2D 16140 bytes
SHA-256: 1ffca1ef16be5e2ec436e77f9211a88ad3199dc781cb76600401cc2e2c7dce6d

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