Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac3bd89db4b3222f…

MALICIOUS

PDF

71.1 KB Created: 2021-03-04 13:08:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 43cf92bdb993c12889bc863b817850d0 SHA-1: 54a9017a9891fb790dfc53ed89a6ca7868a9dc81 SHA-256: ac3bd89db4b3222f381ae20e85f21617768edd448b6b328ffca7ccab75d70868
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/award?keyword=why+won%2527t+my+jack+lalanne+juicer+turn+on PDF link annotation
    • https://monowulesamewul.weebly.com/uploads/1/3/2/6/132682048/lapupamezetus-fukix-vemupokazev-fizibajadawu.pdfIn PDF document text
    • http://zalofamanaw.22web.org/new_odia_bhajana_song.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459176/normal_602d2a7a43a42.pdfIn PDF document text
    • https://fofapisobav.weebly.com/uploads/1/3/4/7/134712410/a23c51d.pdfIn PDF document text
    • https://mesowusiwa.weebly.com/uploads/1/3/5/9/135975120/kameruwadot-tekobivebub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505699/normal_60359cf85cfbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496151/normal_5fd817889e60c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465565/normal_5fcf26f9a3d01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452193/normal_5fd1341b19faf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465267/normal_601b6cdd74828.pdfIn PDF document text
    • https://towoxaji.weebly.com/uploads/1/3/0/7/130740158/nukez.pdfIn PDF document text
    • https://negogesi.weebly.com/uploads/1/3/0/7/130739616/a656b5.pdfIn PDF document text
    • https://nekemobo.weebly.com/uploads/1/3/5/3/135323096/gininanew-bebugu-gunojuv-xibesunipij.pdfIn PDF document text
    • https://venolebibu.weebly.com/uploads/1/3/5/3/135348563/rosibogor-gefop.pdfIn PDF document text
    • https://tovakuroxi.weebly.com/uploads/1/3/1/1/131164121/perepugapegim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401694/normal_5fdad93a2c9f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366020/normal_6025e74bcb75a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sotatelovutegep.epizy.com/47878230218.pdfIn PDF document text
    • http://xozelabudizi.epizy.com/depotur.pdfIn PDF document text
    • http://pexaniruvuwuwe.rf.gd/chimney_inspection_report_template.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_off0000d850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD850 5240 bytes
SHA-256: f374031f35a9a27b2fc6f55d9b1bfb3de4249f3ecb29250037ea7e2c2eb87e0f
font_01_sfnt_off0000ea1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1E 10848 bytes
SHA-256: a0c780c0ab24d04d9cff474673083b202dccc3b61a8bee4536a718ec209394f0

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