Malicious PDF — malware analysis report

Static analysis result for SHA-256 44ae2bf8a7965f72…

MALICIOUS

PDF

82.6 KB Created: 2021-01-30 14:56:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: e8491e5710e58f7d353e861e752e12e0 SHA-1: 2cceeb06dda1102f6eb717e6aac0e9a99351aeb9 SHA-256: 44ae2bf8a7965f72b2a7448e993882f889387cfa12f3d7701326cfdb4f3b7446
214 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various platforms, suggesting a link farm or SEO manipulation tactic. The primary URL identified, 'https://crophysi.ru/aws?utm_term=hd+online+movies++website', is flagged as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/aws?utm_term=hd+online+movies++website In PDF document text
    • https://kegegizexuf.weebly.com/uploads/1/3/4/0/134042356/4603932.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495550/normal_5ff3633937a30.pdfIn PDF document text
    • https://nikojaba.weebly.com/uploads/1/3/4/6/134683319/ledabekagowopozijesa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366381/normal_5feb287785570.pdfIn PDF document text
    • https://muzikalojex.weebly.com/uploads/1/3/4/0/134012647/1b314ace7659.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366050/normal_6013653e95067.pdfIn PDF document text
    • https://jukatuve.weebly.com/uploads/1/3/2/7/132741058/29e83222442.pdfIn PDF document text
    • https://cdn.sqhk.co/mawejoxejobe/i62jiPT/ak47_machine_gun_sound_effect.pdfIn PDF document text
    • https://fuwipinax.weebly.com/uploads/1/3/4/0/134016709/569981.pdfIn PDF document text
    • https://cdn.sqhk.co/dogutadova/jid9jcY/dudigigafalijagatadep.pdfIn PDF document text
    • https://xiruzavaxukegaf.weebly.com/uploads/1/3/5/3/135324830/munumuvovilibuj.pdfIn PDF document text
    • https://tikodukika.weebly.com/uploads/1/3/0/7/130776738/147087.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4527747/normal_6002c8e1374b9.pdfIn PDF document text
    • https://cdn.sqhk.co/kojetovukufo/idgeihL/dokdo_toner_cosdna.pdfIn PDF document text
    • https://cdn.sqhk.co/pixazizaze/d6qAzny/wanogo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/pisorefuruwawinukitipo.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/chicago_style_citation_online_report.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/92231916086.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/wigibupipetup.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/definition_budgeted_cost_of_work_performed.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F1 4916 bytes
SHA-256: d001de47093153eed8a1045c709f3c2e9c54e1fadc1ce13d9fa8df4a9fae684f
font_01_sfnt_off000117a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A6 11076 bytes
SHA-256: 0d9ba411a37adfd2b31899cbaa5d388ee4bc74d90644c79aa2a6dad60e3c443b

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