Malicious PDF — malware analysis report

Static analysis result for SHA-256 000a97476661b4d6…

MALICIOUS

PDF

93.0 KB Created: 2021-03-10 12:45:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 1771b4bb6e7ca421c3a55b31ebfeb976 SHA-1: 22d14ef19e0cd952dcd7fce1ec75826e80298d9f SHA-256: 000a97476661b4d6da8e70947efc2dcd76425069bbdb450a7879a9cbb01a60f8
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful websites.

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://xezojetit.ru/strik?utm_term=catch+me+if+you+can+imdb+trivia PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451950/normal_602d74f72667e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476429/normal_6006f0afd03b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495854/normal_5fe767189efa9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492871/normal_6003730cc4f83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480412/normal_60215cea4660b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462982/normal_60392d1f89d6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490252/normal_60355293bc1c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379048/normal_602c276bf07c6.pdfIn PDF document text
    • http://koguled.22web.org/86346976574.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368497/normal_60148275d1254.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://091a8774-b5bd-4fb7-8799-8d1ca0ca44ad.filesusr.com/ugd/8716ab_34426f8a1186441b8864a6691a467e43.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sewamos/free_balance_sheet_template_for_word.pdfIn PDF document text
    • http://giwofigu.epizy.com/huskee_snow_blower_24_inch.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/butchered_full_movie.pdfIn PDF document text
    • http://jelelonu.rf.gd/2d_geometry_worksheets_grade_6.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/short_paragraph_on_dog_for_class_4.pdfIn PDF document text
    • http://jerekapubujiw.rf.gd/ronowagetobadinizi.pdfIn PDF document text
    • https://29aa9d28-cc9d-45fc-8d86-3718b5881c84.filesusr.com/ugd/74c34a_d341af7ca7544ee4a028a71c062d5d71.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dupula/rafarugezusudezonolubunu.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/teacher_s_guide_english_10_unit_2.pdfIn PDF document text
    • http://mevusajilitum.rf.gd/carry_on_size_limit_jetblue.pdfIn PDF document text
    • https://436c154b-1c2d-4c60-9768-ed3a268ef5e1.filesusr.com/ugd/e8e253_668c260fce854c1cb24f64c9dcc31766.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_off00011f10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F10 5256 bytes
SHA-256: 1980c30ee2da27f0e11d1bb626525b3e0457cb5354660755e575a75be6ae55c3
font_01_sfnt_off000130d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130D5 11672 bytes
SHA-256: fd8a42de9fe8b3378c759b091eef3227c1a18ccd5bd5c4355e707e9cb8ba0744
font_02_sfnt_off00015876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15876 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2