Malicious PDF — malware analysis report

Static analysis result for SHA-256 f517dfb65deb62a1…

MALICIOUS

PDF

72.8 KB Created: 2021-03-17 17:46:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 694ee0be73d93b00425849a9586b36fd SHA-1: 9b9b4e020331543088601306e2ae9a2f5ba0df0d SHA-256: f517dfb65deb62a17b34fcce97fa15d645aae68b40b65bcf06d47d545e1f72fc
214 Risk Score

Malware Insights

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

This PDF file was flagged by multiple critical heuristics as malicious, including a redirector link and a link farm. The embedded URLs suggest an attempt to direct users to potentially malicious or phishing content. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution lure, likely delivered via spearphishing.

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://yafferge.ru/123?utm_term=polaroid+frame+png+free In PDF document text
    • https://wemedasexokava.weebly.com/uploads/1/3/4/5/134512162/tumezuwijonegak-berofadidu-xafita-fadowixuvo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402519/normal_60055631dbf8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487663/normal_6051449013ac4.pdfIn PDF document text
    • https://lojopozubog.weebly.com/uploads/1/3/1/6/131606756/1aad0cc19d2.pdfIn PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/jorutoderi.pdfIn PDF document text
    • https://kewakovek.weebly.com/uploads/1/3/4/4/134467638/tuvotudin_mixiregevu_meraxitowufuken_xepidumaxenu.pdfIn PDF document text
    • https://toxupuxuforiri.weebly.com/uploads/1/3/5/9/135966975/82affe008f018ab.pdfIn PDF document text
    • http://kedejusofapirej.22web.org/ziretu.pdfIn PDF document text
    • https://jevokave.weebly.com/uploads/1/3/4/2/134266272/wefujutaluwage-dujefowuvisidi-ziwabe-gozaralo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471969/normal_601743bb001d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427506/normal_5fcfebdc8b82e.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/viregujipowuru/10104142599.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/dewopinafimapixelixepu.pdfIn PDF document text
    • http://zetipetarot.rf.gd/20048227799.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/corpus_christi_cranebrook_school_uniform.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/blitz_brigade_free_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/kukazowox/picsart_old_version_2017.pdfIn PDF document text
    • http://suxumebesajiner.rf.gd/nukunup.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/travel_tourism_competitiveness_report_2013.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/how_do_i_fix_my_apple_magic_mouse_2.pdfIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/going_to_plans_worksheet.pdfIn PDF document text
    • http://nomekerileme.epizy.com/1488639889.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_off0000e04f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04F 5184 bytes
SHA-256: e983bd1779ab3aaf085ece2546153679b1e5892d9f47fb05a2a7b18e02b8e9af
font_01_sfnt_off0000f1e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E5 10504 bytes
SHA-256: 9f4beb992e1373c5f8bad80c5e56bb30a3c4421fe832d8579afeca643d0ebdf8

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