Malicious PDF — malware analysis report

Static analysis result for SHA-256 191e4d6a45ad70cf…

MALICIOUS

PDF

67.9 KB Created: 2020-12-15 20:00:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 013a344be6c6a27958c68817b92ecde5 SHA-1: ed461718f256d27d98b59dc19d0df1649154cbcb SHA-256: 191e4d6a45ad70cfb1fdbf9616a5d73883484ff937fa65d35d803e3ff379819d
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffmen.ru/aws?utm_term=tell+me+about+yourself+best+answers+dating'. This URL is likely used to lure users to a malicious site. The ML classifier also strongly flagged this PDF as malicious, and ClamAV detected it as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, contains strings that appear to be part of a lure, and the authoring application suggests it was generated programmatically, common for malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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=tell+me+about+yourself+best+answers+dating In PDF document text
    • https://cdn-cms.f-static.net/uploads/4426551/normal_5f9ae4ead88c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389108/normal_5fd1857d4f09e.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/5fc168c927a199023ab8f22b/t/5fc4a3b42dd96f591881108c/1606722484954/59215534202.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc54b8ff7cf8c754047d5ed/t/5fc62b027acac6192a948212/1606822660089/extreme_car_driving_simulator_2019_download.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/assassination_rogue_7._1._5_pve_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc541af24b06a7eb31c2be5/t/5fd68d795b1f6f7539de07b7/1607896447955/b1_free_archiver_offline.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2ccee5687f52b6b8d7e2d/t/5fd0fd273b3fc2561d3d3d93/1607531820934/m._u._d_rally_racing_mod_apk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5b5a3c30a162e0c73770f/t/5fd1523e6427d128dbd0c6be/1607553598937/legend_of_sword_and_fairy_4_trailer.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/risawu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2f4615687f52b6b8e9594/t/5fcebd1893aac70b807c8a51/1607384345760/indoor_bow_shooting_near_me.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_off0000cdf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDF0 5508 bytes
SHA-256: 7389672864333bb5731e791a8f1423d4a4f072e22961b8bbcde09ff0230f2f2e
font_01_sfnt_off0000e0a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A5 10116 bytes
SHA-256: 5da87dca596025f705d5cb3fc326b2066b064d3bbff39eb387062c6a2b4e9d63

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