Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf7dc529648a33ad…

MALICIOUS

PDF

77.5 KB Created: 2021-02-27 07:35:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 4c6de12d01eedd56a7f114ff8837c340 SHA-1: b176d386dab45a7daa2424277e55724606f1d5f8 SHA-256: cf7dc529648a33ad77f7889c37352ba77873635e47aa3947584224824652bea4
186 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a significant number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of embedded URLs and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/strik?utm_term=beautiful+creatures+tarot+review PDF link annotation
    • https://duxobibalarig.weebly.com/uploads/1/3/4/3/134360367/mananejaro_zijitopog_butazazapiko.pdfIn PDF document text
    • https://wavoxodasamemat.weebly.com/uploads/1/3/5/3/135348105/8009355.pdfIn PDF document text
    • https://zikamesezelili.weebly.com/uploads/1/3/4/8/134857079/539a302.pdfIn PDF document text
    • https://zanugikujo.weebly.com/uploads/1/3/4/3/134399251/716e8a629aad.pdfIn PDF document text
    • http://misstourist.info/tulokojinogoxazaxikuposp2s.pdfIn PDF document text
    • http://latencfsrt.space/zekidumilasupoferijukexizz9be1.pdfIn PDF document text
    • https://jepibuko.weebly.com/uploads/1/3/0/7/130739686/gozerosukenufig.pdfIn PDF document text
    • http://supportcopyright.net/66060570028uix0z.pdfIn PDF document text
    • https://dawopodesolapip.weebly.com/uploads/1/3/5/3/135327749/jexaxigulubom.pdfIn PDF document text
    • http://paxawujaxoda.22web.org/70434811850.pdfIn PDF document text
    • https://xaminipa.weebly.com/uploads/1/3/1/0/131071220/vebubosikaz_notoletati.pdfIn PDF document text
    • https://livuwijonirib.weebly.com/uploads/1/3/4/7/134732661/junefewonewitexojot.pdfIn PDF document text
    • http://hookup682.site/formule_simple_chute_de_tensionu1fhi.pdfIn PDF document text
    • https://fofifakexetag.weebly.com/uploads/1/3/4/3/134345684/706a6ecb1b955.pdfIn PDF document text
    • https://lesikikonojen.weebly.com/uploads/1/3/0/7/130740189/7389353.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/gotitibekovi/42342091944.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/14318064630.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/literature_and_the_writing_process_backpack_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/88932313958.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_off0000f25a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF25A 5076 bytes
SHA-256: 8efda902e60df7987bfc088a82df99b1c885ceb51cd5a9976c5c9e7fdbaa1bda
font_01_sfnt_off000103c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C7 10820 bytes
SHA-256: 2a658965583c3c9a4336e730ac7f4c55bb808913cfd967255edab7b24b1bf09f

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