Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f3477cd1b35d80b…

MALICIOUS

PDF

76.7 KB Created: 2021-03-24 23:48:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 489f73e40e708e9f2eb5edb0b11486b7 SHA-1: 1007da376ca3067ad7d8488ea102b9d01c990370 SHA-256: 3f3477cd1b35d80bb03081682ae957af065c322b315971ec9ea814aed1217314
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://baarspo.ru/wix?keyword=jurassic+world+evolution+game+apk+download PDF link annotation
    • https://gojijaxokan.weebly.com/uploads/1/3/0/7/130739343/peputuj.pdfIn PDF document text
    • https://kutowovazamil.weebly.com/uploads/1/3/4/3/134362820/potikoto-gefabebakusiv-nexirevefozepi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402956/normal_603a703409556.pdfIn PDF document text
    • http://jifarobajis.sportsontheweb.net/physics_formulas_for_class_11_and_12_free_download.pdfIn PDF document text
    • https://mipikarekegimo.weebly.com/uploads/1/3/1/6/131606279/e460d7.pdfIn PDF document text
    • http://delojenopow.66ghz.com/tilokujorisekun.pdfIn PDF document text
    • http://bawoputameded.iblogger.org/rodawomofapolil.pdfIn PDF document text
    • http://lubevos.scienceontheweb.net/tovopukuwimaro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368492/normal_6044699653229.pdfIn PDF document text
    • https://xavabakonoliwif.weebly.com/uploads/1/3/4/4/134477423/rixiwejozomosizigef.pdfIn PDF document text
    • https://mefutugotipefij.weebly.com/uploads/1/3/5/3/135304762/4417315.pdfIn PDF document text
    • http://idealicacolumbia.site/dinuvimo8pisv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419410/normal_5fe5e8e0dc538.pdfIn PDF document text
    • https://rofibefis.weebly.com/uploads/1/3/4/1/134131293/31ed6817d.pdfIn PDF document text
    • https://wegudogixudefup.weebly.com/uploads/1/3/1/4/131438345/ddce0.pdfIn PDF document text
    • https://pilonalamajavex.weebly.com/uploads/1/3/1/1/131164122/8466881.pdfIn PDF document text
    • http://jivusibofonefud.mygamesonline.org/argentometric_method.pdfIn PDF document text
    • http://wulurag.mygamesonline.org/the_alchemist_full_book_free_download_in_urdu.pdfIn PDF document text
    • http://bu-markett.com/65232348715ebuqm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://famojubosaved.rf.gd/91921161755.pdfIn PDF document text
    • http://wubezirinipo.epizy.com/26196527231.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_off0000edb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB1 5600 bytes
SHA-256: d47004a89187996e524ba9de566805d3a71752f70c6bf33fa610aaa8796b9f2f
font_01_sfnt_off000100be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100BE 10664 bytes
SHA-256: e9d7944572500f32bb51c5372c42660723b8892feefab7d24f4c7bb603c1bc1d

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