Malicious PDF — malware analysis report

Static analysis result for SHA-256 95c0facc8e19899e…

MALICIOUS

PDF

76.7 KB Created: 2021-04-11 12:25:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: cdad3a9580e5b7b7b0f275607d337f3a SHA-1: c1f92f5614370c89bc02f84b1ec82e91b48440e7 SHA-256: 95c0facc8e19899e632300cf1435811d5e61389c1fad6008cd39eaa464b877cf
156 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 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 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.
  • 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://zajinet.ru/strik?utm_term=in+the+mood+for+love+wong+kar-wai+streaming+vostfr PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4448129/normal_5fd144ed2fc64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481994/normal_6045809d53b02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393521/normal_606219760baa8.pdfIn PDF document text
    • http://libutulidux.medianewsonline.com/13_attributes_of_god_list.pdfIn PDF document text
    • http://kepuxom.mypressonline.com/agroforestry_notes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454277/normal_5fe41bb0350f5.pdfIn PDF document text
    • http://xonitaj.mywebcommunity.org/69067992052.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427523/normal_600244b3bb96a.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/sugosubexez/puwirer.pdfIn PDF document text
    • https://9d50af6f-dbf7-41ba-b854-83985329a12b.filesusr.com/ugd/33c377_0ecc7934ae35467f89efe2ab19788293.pdf?index=trueIn PDF document text
    • https://9170d309-caca-4186-8987-bf6b40ce219c.filesusr.com/ugd/baef12_a191fb3e907644ad8e907defb39e08d4.pdf?index=trueIn PDF document text
    • https://d6a293f2-6876-493d-91b7-c13182b05023.filesusr.com/ugd/bcaa7e_bd30fc8856734aef9aec6541c3519325.pdf?index=trueIn PDF document text
    • https://68f2566a-c586-4d15-a5d1-3a72044c38f3.filesusr.com/ugd/ecec20_d91989daf31c40a492c28081cb723e3f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gonasidupij/6246817764.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/personal_allowances_worksheet_line_d.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/loud_doorbell_sound.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/jagowedozuz.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/93477853609.pdfIn PDF document text
    • https://d52aed46-be45-4f9b-8106-cf6fc7ee66c0.filesusr.com/ugd/b148e5_afbde524650e4d2784875e641550d469.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/5787575008.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/jupyter_notebook_online_google.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_off0000e7a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A7 5504 bytes
SHA-256: a8a2b19c26bf45c77a5a15f99215aa504d806a579bf6da44c2c075141d38660a
font_01_sfnt_off0000fa55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA55 12512 bytes
SHA-256: a23440c48a806a914d3b37ac03c6b81a5c4346e7b90d10df93d2277170f54fec

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