Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b7d0983e7f261aa…

MALICIOUS

PDF

78.8 KB Created: 2021-03-11 02:31:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 1855bba746051853778fd4d6f24cfe06 SHA-1: 90e8d9d6a4387c5ac8ab4ed242bf8cb8acc81821 SHA-256: 9b7d0983e7f261aa336249313502add408b4f0b95f4de1cb6d884a7275145b31
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a link farm designed to direct users to potentially malicious websites. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The embedded URLs, such as dugedepap.ru and various cdn.sqhk.co domains, are likely used to distribute further payloads or host phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dugedepap.ru/wix?keyword=amazing+spiderman+2+apkpure PDF link annotation
    • https://cdn.sqhk.co/ratevusur/jc7jijg/42633989955.pdfIn PDF document text
    • https://cdn.sqhk.co/vuramufef/2gi8gel/ps4_emulator_for_pc_download_windows_7.pdfIn PDF document text
    • https://cdn.sqhk.co/nivatasob/HT17uia/wikevofi.pdfIn PDF document text
    • https://cdn.sqhk.co/mutobudenit/bIpOjbF/furefazopozane.pdfIn PDF document text
    • https://cdn.sqhk.co/goxepijikun/bVjbMja/pc_games_to_play_with_controller.pdfIn PDF document text
    • https://cdn.sqhk.co/tupipitijil/FhdG3cM/niwupirubisiz.pdfIn PDF document text
    • https://cdn.sqhk.co/pixisuja/iIjbT8E/1727981483.pdfIn PDF document text
    • https://cdn.sqhk.co/zufuxirap/Z0U4hVC/real_racing_3_free_download_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/kewawukufiju/bnhhhds/pound_cake_drake_sample.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487658/normal_6048e53f2646b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379846/normal_6020309d890b5.pdfIn PDF document text
    • https://cdn.sqhk.co/kewebogi/jggcQ9m/hair_salons_open_in_san_francisco_covid.pdfIn PDF document text
    • https://cdn.sqhk.co/pibexezases/diJlhbL/army_of_darkness_defense_mod_apk_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://b56e6f12-3f4b-4b75-bc29-9585eb3fba71.filesusr.com/ugd/73f0dd_414bf2beb3df4bc4a841f1a76def3935.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/wosofi.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/bixakowiwadin.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/yowhatsapp_8._0_free.pdfIn PDF document text
    • https://6c8ebe11-725c-420b-823a-68bc39d02ad2.filesusr.com/ugd/3e87bf_6053743c7c774d5a96d03bc996c2a54e.pdf?index=trueIn PDF document text
    • https://484a0fbd-04e0-416f-b335-41eb3f66808b.filesusr.com/ugd/228afb_efe15e6943d146a287363138784d0bfe.pdf?index=trueIn PDF document text
    • https://9b704b87-3668-414c-a24e-b30400fe0e33.filesusr.com/ugd/51c472_8d267d5573dc4b078ae4f539c0598d79.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zonivezada/99705098756.pdfIn PDF document text
    • https://61069a5e-3c5f-4884-a3c7-8c7552058b74.filesusr.com/ugd/0789d5_478fac0297324dfe9f5fc0c4937aceae.pdf?index=trueIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFB9 7640 bytes
SHA-256: 24c014aec858953bc4a1050d02ce44611ff1d8e400c629130b424210a1101b71
font_01_sfnt_off0000e8a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A9 5172 bytes
SHA-256: c174a4a27b7646190c2a4f8f32c15f00005b5df5fcb2835305804ee8162a9a6c
font_02_sfnt_off0000fa1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1D 10196 bytes
SHA-256: 2597f36ca46062a2f2dbd30850b73016998ff308d5920d61aeea1c509f611ec1
font_03_sfnt_off00011d1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D1B 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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