Malicious PDF — malware analysis report

Static analysis result for SHA-256 415febfc9a6e39ab…

MALICIOUS

PDF

108.9 KB Created: 2021-02-28 09:03:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a4a66d162d935c3744e7beb1e963bfe2 SHA-1: 44e3ec5fff050ed0a197f5bbfe66707264fb3774 SHA-256: 415febfc9a6e39ab7d23d85c44c885b430ab6e3951ff98c9e1d916430f0ad91b
214 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics, including PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM, indicating it contains numerous links to potentially malicious or phishing sites. The ML classifier also strongly indicated maliciousness. The embedded links suggest an attempt to lure users to external resources, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/123?utm_term=las+medias+de+los+flamencos+caracter%25C3%25ADsticas+de+los+personajes In PDF document text
    • http://copyrighthelp.info/evidentiary_objections_cheat_sheet_federal6qx62.pdfIn PDF document text
    • http://3gusevshop.website/63738744252kp0ex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411683/normal_5fdc2bba0d623.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408984/normal_5fe557dbdcd28.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466413/normal_5fce341f57bc8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373522/normal_5fee0872a01c4.pdfIn PDF document text
    • http://misstourist.info/outlander_book_nine_release_dateoruom.pdfIn PDF document text
    • http://thelandofbadideas.com/kovexavifizaganb73hv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454290/normal_5fe139c17367d.pdfIn PDF document text
    • http://srakan.space/social_media_marketing_strategy_20203xpg5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418981/normal_5febf29eb2496.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445532/normal_5fde0b13ca54a.pdfIn PDF document text
    • https://wunaramalus.weebly.com/uploads/1/3/4/5/134576193/dadijojow-dexuzemen-tavadageja-jodasem.pdfIn PDF document text
    • http://twirlini.com/climatronic_golf_5_manualkwi70.pdfIn PDF document text
    • http://wordsideget.top/mobile_application_development_tutorialetw3k.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414339/normal_6009dc60e2f29.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368474/normal_5fe2ceee33d71.pdfIn PDF document text
    • https://sojagimizalafar.weebly.com/uploads/1/3/5/3/135317111/senekipoxabo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000146b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146B4 5372 bytes
SHA-256: 85b81db407563c9e9e04932796dfd192297f27a3f847b337b24b87104c624419
font_01_sfnt_off000158ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158EA 3720 bytes
SHA-256: 40ef96da86b6123d577d475be460de15c41b9ca7393a8e650be4e9942aa3c64b
font_02_sfnt_off0001644c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1644C 12528 bytes
SHA-256: a0d28a3a41c7f6f6075c232654eb83e27423bc10e4a7fb4539b9380cb802fced
font_03_sfnt_off00018cd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18CD2 16168 bytes
SHA-256: 8c1e3298cb301b6aa2c2aeff0a89e1cafee6626e56d5ffa98ad52a7598c40df9

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