Malicious PDF — malware analysis report

Static analysis result for SHA-256 35932e2628687d4b…

MALICIOUS

PDF

78.9 KB Created: 2021-03-09 00:58:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 33fa0ac926a93cfb025bb1d4d0c2732e SHA-1: 211e12422898d75b70045ada0febf0b96dd5ea5f SHA-256: 35932e2628687d4b8ff6885e8245a9c5bd3fae16ca165471eadc70b18d259802
126 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains multiple embedded URLs, with one prominent URL suggesting a lure related to credit bureau delinquency reports. The document's structure and embedded links indicate it is designed to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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 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://midufefew.ru/123?utm_term=report+delinquency+to+credit+bureau PDF link annotation
    • https://cdn.sqhk.co/janezewufaj/YnE7gcG/rijeweb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421464/normal_60333f4eede6c.pdfIn PDF document text
    • http://nemosixumeki.mypressonline.com/96044094087.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417990/normal_602640f81faff.pdfIn PDF document text
    • https://cdn.sqhk.co/fekawifen/jcgdvBR/52568660292.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376599/normal_603f69045c53a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453098/normal_603d28b7c0d37.pdfIn PDF document text
    • https://cdn.sqhk.co/pafevola/jDjcUKw/ringtones_for_iphone_xr_free.pdfIn PDF document text
    • http://guzoseta.getenjoyment.net/tizuler.pdfIn PDF document text
    • https://cdn.sqhk.co/turaxulefa/JhdYEtb/19479249514.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373261/normal_5ff982f6b1d57.pdfIn PDF document text
    • https://cdn.sqhk.co/pozusonitid/1ididhd/easy_anti_cheat_free.pdfIn PDF document text
    • http://julivojurukumu.sportsontheweb.net/79445081331.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
    • http://bamonoxo.onlinewebshop.net/fifth_third_bank_job_application_status.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60d125e8-6279-4c02-8af3-309a43837e1f/what_is_phantom_of_the_opera_really_about.pdfIn PDF document text
    • https://31c8a3d4-0132-49f1-a04f-09c79d03e01f.filesusr.com/ugd/a4da84_2f76eee5b5df439ab847a433fafbe6ad.pdf?index=trueIn PDF document text
    • https://507d1b22-ea03-4061-a262-f79425337ca2.filesusr.com/ugd/a374b9_6922d808e2d3499ea8f2c0fae4bbdc92.pdf?index=trueIn PDF document text
    • https://a40b6db0-1679-4e03-879f-ac5827b9aa7d.filesusr.com/ugd/dba42a_12e5ab7c48cd4d4b8aa5eba16b322cf4.pdf?index=trueIn PDF document text
    • https://c4e42e93-254c-4ba8-b495-737f84002742.filesusr.com/ugd/ddb60a_20cd3d6384924b2dbf7887180abe6ad3.pdf?index=trueIn PDF document text
    • https://f84ffea9-2755-49c2-9cb5-47ca8b55fe65.filesusr.com/ugd/0adedf_97ee2b87c6d142b9a13610cd2878e884.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/308d0e2d-3f33-4027-8c96-b49214883ecc/delisagusu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7d8375c-3ddc-41f4-adcf-5f4848827cb6/97293106706.pdfIn PDF document text
    • https://2a983b51-2e13-4971-8c1f-a5bca3ab4353.filesusr.com/ugd/e1a791_333ab5bd80bf438890c66eb22ec9d2c3.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB31 5148 bytes
SHA-256: 442f62a023310079311d7876d8335446c9b749f12d7e60cd9558c8277c0224ad
font_01_sfnt_off0000fcc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC0 10288 bytes
SHA-256: e99154358f5b233700757a9fef14dec2c7df64ab97a4e525c6ada06dbb3ca29e
font_02_sfnt_off00011ffc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FFC 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333