Malicious PDF — malware analysis report

Static analysis result for SHA-256 be9dfa10b09b4d8a…

MALICIOUS

PDF

67.2 KB Created: 2021-04-04 16:30:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 832179e84fe33137b376c2c7c5ed0183 SHA-1: 9cea747b4ed54cc5cf4c0d336f551942a4c324ef SHA-256: be9dfa10b09b4d8ae55391cb604e949c30f864051a499838eaf8686f9929d815
186 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/wix?keyword=envision+math+common+core+4th+grade+answer+key PDF link annotation
    • http://dawexefif.getenjoyment.net/japepexuxibonejexigo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409244/normal_606717d46769e.pdfIn PDF document text
    • http://50offstore.pro/07_civic_si_oil_typebzd9z.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530937/normal_603a9a4859cdb.pdfIn PDF document text
    • http://bbbbbbbbeeee.space/pufekufiodzeq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467577/normal_604732f538a9a.pdfIn PDF document text
    • http://insurancesouk.com/13339560984okteb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366397/normal_6001353365a40.pdfIn PDF document text
    • https://gisodotok.weebly.com/uploads/1/3/5/9/135971357/e47ab10.pdfIn PDF document text
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/depelogibuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420250/normal_6015577f8153d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494674/normal_605de58940ad6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482020/normal_6062127e25a5a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369797/normal_5fdef907be3a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477139/normal_5fd6e9e02e8a9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nabulegewuwal.myartsonline.com/new_moon_june_2020_spiritual_meaning.pdfIn PDF document text
    • http://jimomurapujivo.onlinewebshop.net/canon_canoscan_8800f_manual.pdfIn PDF document text
    • http://bavufupuvamopaf.atwebpages.com/32875135857.pdfIn PDF document text
    • http://sebedugufafa.rf.gd/92263264566.pdfIn PDF document text
    • http://virefixifefuke.epizy.com/rulewukitakokepeganen.pdfIn PDF document text
    • http://fugexumelelada.rf.gd/lozetigusat.pdfIn PDF document text
    • http://mokufapupajenap.epizy.com/theta_healing_teknii_nedir.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_off0000ca1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA1F 5684 bytes
SHA-256: 3da88c5134a9b1327e924003b7aa7ca4a33479579add2db4c3319997a42c4991
font_01_sfnt_off0000dd73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD73 9852 bytes
SHA-256: ba1765f16e4d97ee255a83d7a02d1b4b51916ac3dee6cd97f716dc31654e5343

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