Malicious PDF — malware analysis report

Static analysis result for SHA-256 193fd91522804804…

MALICIOUS

PDF

83.9 KB Created: 2021-03-12 20:48:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6500ae31f024c948faa8a94afed9526e SHA-1: 9f05dd5f33cebd2c9458096f68af13352e7b2f9e SHA-256: 193fd91522804804d6e568953e8c189790ab015247b977177a172a34eb1d7e4a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://resalured.ru/strik?utm_term=why+isn%2527t+my+mini+keurig+working PDF link annotation
    • http://mrshadow.net/tubofipiwipulonann4e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368984/normal_5ffbb7e50125d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489032/normal_5fc8608ee9f3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408172/normal_5fdc8a4c45541.pdfIn PDF document text
    • http://lufusozajufa.22web.org/wapodolumavugufa.pdfIn PDF document text
    • http://p-kavkaza.ru/mirujizeme1il7f.pdfIn PDF document text
    • http://fobexugelego.getenjoyment.net/48327495522.pdfIn PDF document text
    • http://smeh-mif.space/neighbor_home_smasher_apk_android_oyun_clubm0nkc.pdfIn PDF document text
    • http://plsale.pro/9_months_before_october_24_2006aw1sy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411702/normal_6006661e756c1.pdfIn PDF document text
    • http://kinemulawaw.sportsontheweb.net/botagejizimularufixu.pdfIn PDF document text
    • http://vknart.xyz/0.13.1_minecraft_pep5lym.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://84d5b3ab-51dd-4312-87b7-51df18fb3b26.filesusr.com/ugd/9ea9b6_c3320782e9d54de0b0ef4c3fa85a9fb7.pdf?index=trueIn PDF document text
    • http://rujidafedisezu.atwebpages.com/43336234888.pdfIn PDF document text
    • https://5fdaa9e0-ad6d-443b-8779-beb8e45026dc.filesusr.com/ugd/05301a_d45a05b3aa42428f8723eef9dba7d2af.pdf?index=trueIn PDF document text
    • https://436010f1-0dd7-4950-aec0-3bdf337573e8.filesusr.com/ugd/5a4c69_f3531cec736b4971a6f1fef15c5a38ac.pdf?index=trueIn PDF document text
    • https://1a2149e7-ca7f-4e7c-a584-0e483de6f3af.filesusr.com/ugd/9219f8_95b014f7a65245a6af6cd47f05f6a88e.pdf?index=trueIn PDF document text
    • https://3926d074-74ab-41cc-aa9d-340192ccda4e.filesusr.com/ugd/5619e7_3388530f0a824252b2d91cfbb99b0cd2.pdf?index=trueIn PDF document text
    • https://128fc002-9ed4-4a8f-9a6b-83b43563a9ed.filesusr.com/ugd/6812d7_a6e736ba65104c9d95a16787ccbe443f.pdf?index=trueIn PDF document text
    • https://f7cac2f2-528f-490f-9bef-cb2448a877de.filesusr.com/ugd/529ba0_c97697fddd35496cbf6b26aafe703f88.pdf?index=trueIn PDF document text
    • http://gevejonitu.onlinewebshop.net/redilamif.pdfIn PDF document text
    • http://keputeka.epizy.com/39485824520.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7F 5044 bytes
SHA-256: 636a86de52b6050aad80964f7423ca1294e9f9b1846bc4e1336a60c7052fa29a
font_01_sfnt_off00010f94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F94 10492 bytes
SHA-256: e4152716ba6e3668f380098a333f3c40c372950d26e419f918d96d972c1fa62f
font_02_sfnt_off00013343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13343 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3