Malicious PDF — malware analysis report

Static analysis result for SHA-256 f37b7b8e3b424929…

MALICIOUS

PDF

87.0 KB Created: 2021-04-02 17:04:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a70ede3d16cca4b20bc3c3821b4e74c SHA-1: dd3d4d041a4bb08f3ab343c9e12531195549b2d7 SHA-256: f37b7b8e3b424929377480d8bc948bde5420c55e280fb1bee67cfdecce7e57d4
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, suggesting it's designed to redirect users to a potentially harmful site. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution attempt.

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jottigo.ru/award?keyword=baby+shower+biblico+catolico+pdf
    • https://static.s123-cdn-static.com/uploads/4403282/normal_60045579be4e4.pdf
    • http://fashion-deals.xyz/tatef8yx4g.pdf
    • https://cdn-cms.f-static.net/uploads/4448991/normal_6015161665326.pdf
    • http://nikaold.site/533151830950tp9y.pdf
    • http://bajesiradevo.getenjoyment.net/hex_cable_gland_catalogue.pdf
    • https://static.s123-cdn-static.com/uploads/4473056/normal_5fc67a1793285.pdf
    • https://lemusudavigi.weebly.com/uploads/1/3/5/3/135395292/88a0aa6d7.pdf
    • https://cdn-cms.f-static.net/uploads/4368752/normal_5fd67579b19c1.pdf
    • http://sewatumafuta.medianewsonline.com/catholic_catechism.pdf
    • https://roxilegetewus.weebly.com/uploads/1/3/4/7/134721251/3863744.pdf
    • http://xawegap.mywebcommunity.org/31378047519.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/2661d969-496b-4824-9e0c-2fcb5270fb5e/jamowitakavisipigajaz.pdf
    • https://s3.amazonaws.com/nijosinizo/nulerugodipuw.pdf
    • https://uploads.strikinglycdn.com/files/4b6a5d8a-09f8-41ba-b1e7-75308a7e243d/julivonef.pdf
    • http://netawuwimirixor.onlinewebshop.net/how_to_set_my_grandfather_clock.pdf
    • https://uploads.strikinglycdn.com/files/144cf870-adcf-4001-aadc-cd14632d9aa3/28690447353.pdf
    • https://s3.amazonaws.com/jefobexapulow/irregularity_report_synonym.pdf
    • https://s3.amazonaws.com/sewamos/extreme_car_stunts_3d_game_mod_apk.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106f5.bin
9e9da4ae9cd555206964354a2f6cfdce88bdcfd8e53392985cea4bd3f072e093
pdf-font-stream PDF embedded font (sfnt) at offset 0x106F5 5308 bytes
font_01_sfnt_off0001192a.bin
ea8b9a10a64a23a09f28c15f6355d6979b1acc6428f6cb6adca667f54f5abfea
pdf-font-stream PDF embedded font (sfnt) at offset 0x1192A 11708 bytes
font_02_sfnt_off00013f30.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x13F30 4324 bytes