Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d2a3c24eebe12d2…

MALICIOUS

PDF

69.5 KB Created: 2020-12-22 20:21:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 223f5eaa74833464d26b0914df0fad6b SHA-1: 7c099f0988cc9b2d347a417abf45221f31bd9ec1 SHA-256: 3d2a3c24eebe12d2cefd3b1000911e1e432b5f84813786405b181e70360cf0bc
154 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating it is likely a phishing or trojan distribution attempt. It contains an embedded URL pointing to known malicious redirector infrastructure, which is designed to lead the user to a malicious site. The document body, though heavily obfuscated, contains text related to a wedding, likely a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=grand+lodge+of+maryland+wedding
    • https://cdn-cms.f-static.net/uploads/4379032/normal_5fd9c494ddf0d.pdf
    • https://cdn-cms.f-static.net/uploads/4369494/normal_5f971e650ba67.pdf
    • https://static.s123-cdn-static.com/uploads/4427529/normal_5fe0654123fc1.pdf
    • https://cdn-cms.f-static.net/uploads/4365563/normal_5f8b1423482a7.pdf
    • https://static.s123-cdn-static.com/uploads/4474176/normal_5fc7649926bda.pdf
    • https://static.s123-cdn-static.com/uploads/4424982/normal_5fc95e38c885b.pdf
    • https://static.s123-cdn-static.com/uploads/4370097/normal_5fce861b2082d.pdf
    • https://static.s123-cdn-static.com/uploads/4450156/normal_5fe17288275ab.pdf
    • https://cdn-cms.f-static.net/uploads/4381532/normal_5f9480255e43c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1b7663a0-bb76-4d16-9f9e-841b22e207db/72844136691.pdf
    • https://static1.squarespace.com/static/5fc6afd77848ba205d414585/t/5fd7417fab1a676c72a99bef/1607942531519/kixaz.pdf
    • https://static1.squarespace.com/static/5fc4d4b9e5c7695ca9b4bda1/t/5fd0ae57c0a29916a5711424/1607511640625/jeep_patriot_off_road_tires.pdf
    • https://uploads.strikinglycdn.com/files/6b16e0dc-0c48-4163-98c1-4210cd83eed5/cubism_art_easy.pdf
    • https://static1.squarespace.com/static/5fc57b0a116eb00e3c6ae87f/t/5fcef76a7cc0b10a0ac59224/1607399275708/unnatural_causes_movie_cast.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d20a.bin
9ba9739fc522e62708989b56da33290266caefc680a20421b021be9759289537
pdf-font-stream PDF embedded font (sfnt) at offset 0xD20A 5272 bytes
font_01_sfnt_off0000e400.bin
eadb576aa3a683f422c84af8ffa5729354cd8587040c84eb6232c7f2bd9044e9
pdf-font-stream PDF embedded font (sfnt) at offset 0xE400 10924 bytes