Malicious PDF — malware analysis report

Static analysis result for SHA-256 d95e629e8f093ba2…

MALICIOUS

PDF

79.6 KB Created: 2021-02-21 18:42:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 69829385d758a504971873a892db1608 SHA-1: 1a617b134e33f78bdeb3ae22b201421447d3248a SHA-256: d95e629e8f093ba2fc5180580cde15b4d7d46c2111d39957f259d0bd5d483461
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to disposable domains or link farms, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically highlights the use of link farms on disposable hosting, reinforcing the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/strik?utm_term=whirlpool+wtw4800xq2+parts+diagram PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4488133/normal_5fcb1b40e6982.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451028/normal_5ff4dd1ce35d5.pdfIn PDF document text
    • http://netewe8.xyz/60796519960avn2z.pdfIn PDF document text
    • http://antileqphh.site/1834975553759fke.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381976/normal_60013b1991c5d.pdfIn PDF document text
    • http://drilltech.info/adb_driver_documentation_use_usb_android6obbn.pdfIn PDF document text
    • http://zipufofofize.22web.org/30542366125.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411683/normal_5fdb800c46bdf.pdfIn PDF document text
    • http://ericksandoval.com/is_panda_express_healthy_during_pregnancy6xac0.pdfIn PDF document text
    • http://marafonsport.site/34612075246cljvi.pdfIn PDF document text
    • http://doucheapp.xyz/constructive_dismissal_template_uk041vd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://zimozovo.epizy.com/tegidiritekunivi.pdfIn PDF document text
    • http://lapekekefexe.rf.gd/treatment_of_aortic_stenosis_guidelines.pdfIn PDF document text
    • http://xugojejusovofeb.rf.gd/polugavitubadabujasugidit.pdfIn PDF document text
    • http://vewajelawukos.rf.gd/50626044654.pdfIn PDF document text
    • http://xaxurotowikofew.rf.gd/precio_baumanometro_manual_hergom.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/40_hour_work_week_schedule_template.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/xactimate_level_2_certification_test_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/blank_monthly_calendar_template_2019_word.pdfIn PDF document text
    • http://vulusopotu.epizy.com/the_book_history_reader.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_off0000e2f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F3 6228 bytes
SHA-256: ffcf5a9220e215c88af5843f780086a67a1d102f1ff31c7bc0e6d8aca6bd3d33
font_01_sfnt_off0000f812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF812 10660 bytes
SHA-256: 5fcc3517d436a5225947937e8c1e4089161befc92092f6a79e99bbf98c7d547d
font_02_sfnt_off00011cd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD3 5632 bytes
SHA-256: 2aa4a5267508c9cde11a300520834f97cf517b2092f3d8131c7ca4a34fa79147

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