Malicious PDF — malware analysis report

Static analysis result for SHA-256 305bfd08998701db…

MALICIOUS

PDF

71.8 KB Created: 2021-06-02 00:21:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 039e6a754d81d3f1d4f011fb3598446e SHA-1: ce2c4f3b67b7b23dbae6cc01ee92f3195bdab6ce SHA-256: 305bfd08998701dbf910f6f50eb0813ca221546ed047d8b3ede8e57bfd2107d0
126 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on disposable domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

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://oniceh.ru/pbw?utm_term=how+to+adjust+fill+valve PDF link annotation
    • https://tifimiwarefimi.weebly.com/uploads/1/3/4/8/134895051/jolejobefe-sejotexeso.pdfIn PDF document text
    • https://miwejezapelo.weebly.com/uploads/1/3/4/3/134342363/mejoxusova_xozegasipumatu_jifasoxakipi_gotufanokuzat.pdfIn PDF document text
    • https://miradater.weebly.com/uploads/1/3/7/5/137517742/9552116.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368985/normal_6051aca7584e1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471238/normal_5ffe14a61b44f.pdfIn PDF document text
    • https://nogorixarolixi.weebly.com/uploads/1/3/0/7/130740589/e7f007.pdfIn PDF document text
    • https://roxasudafuj.weebly.com/uploads/1/3/0/7/130740166/dodorewe_dorelu_suwapizasel.pdfIn PDF document text
    • https://xidifapub.weebly.com/uploads/1/3/0/8/130873728/549052.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366662/normal_606255f2c5bfa.pdfIn PDF document text
    • https://timijajuvage.weebly.com/uploads/1/3/2/6/132683040/5662308.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388426/normal_5fe35b73d093d.pdfIn PDF document text
    • https://gugebizibepowe.weebly.com/uploads/1/3/4/3/134364706/4219734.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391921/normal_60546f61a41a7.pdfIn PDF document text
    • https://jevamupoledi.weebly.com/uploads/1/3/4/7/134712268/kusader-jinarunubafag-keboj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bilabegape.pbworks.com/f/simple_interest_and_such_worksheet_answer_key.pdfIn PDF document text
    • http://togiwuvoze.pbworks.com/w/file/fetch/144480750/french_verb_conjugation_table_ecrire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a17a13d-ae9e-4deb-a3c7-a90fd22dc313/22536410742.pdfIn PDF document text
    • http://gifavipa.pbworks.com/f/turning_radius_calculation_for_cars.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b99385b3-1bd2-44cc-a7fb-210fbb06df45/venn_diagram_meme_maker_no_overlap.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_off0000de78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE78 4996 bytes
SHA-256: 827d154ed946fecf53aaac8d7ca87b233d00cfcc3c190350489db7cc5b3b3fac
font_01_sfnt_off0000efa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA7 10192 bytes
SHA-256: 89a01c9be89529b237e6b8662cd985cf5742bc7cdf7f9dc7b02cd77624b5f3b0

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