Malicious PDF — malware analysis report

Static analysis result for SHA-256 24feafe626e1c173…

MALICIOUS

PDF

83.0 KB Created: 2021-02-14 14:59:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: db944dbfd64b2b66c1f7c6a432e234d9 SHA-1: d66884cbdb8e02eaa2451b85d7c0bc9646878d12 SHA-256: 24feafe626e1c1731319820fc6af8821d50a7141f4901bbf67492bfa1251b341
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier, indicating it is likely a phishing or malware distribution attempt. The presence of numerous embedded links, including one pointing to known malicious redirector infrastructure, strongly suggests an attempt to redirect users to harmful sites. While no scripts were explicitly extracted, the PDF structure and link farm behavior are consistent with techniques used to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/aws?utm_term=ballplayer+pelotero+worksheet In PDF document text
    • https://devomideribura.weebly.com/uploads/1/3/4/4/134401990/9488654.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366008/normal_5fc5e6f880b82.pdfIn PDF document text
    • https://cdn.sqhk.co/rexukewanej/hidies6/wuwusidagepoli.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483873/normal_5ff4dcf09037f.pdfIn PDF document text
    • https://lilawowawumoxo.weebly.com/uploads/1/3/1/4/131453384/negififuduvemu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366043/normal_5fd05113d434c.pdfIn PDF document text
    • https://ninijaliwejito.weebly.com/uploads/1/3/4/3/134350726/desig.pdfIn PDF document text
    • https://cdn.sqhk.co/nilimijano/XCChdmu/90925794688.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366354/normal_5fc5c15e608c4.pdfIn PDF document text
    • https://vofesoxofibebup.weebly.com/uploads/1/3/4/9/134900141/vuxugozunowo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443610/normal_5fdf566804bb8.pdfIn PDF document text
    • https://cdn.sqhk.co/paleguvebo/jjvgdXa/59021235873.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496404/normal_5fe8d72e3eda9.pdfIn PDF document text
    • https://tedogiji.weebly.com/uploads/1/3/0/7/130775371/9275854.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480884/normal_6019b16a9a18c.pdfIn PDF document text
    • https://diwosilanula.weebly.com/uploads/1/3/4/7/134765308/fomugowipo-zuropu-dimaduzojejapi-kogobuxusig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501054/normal_5fd2c3db2273a.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/vuraradaso/36950302808.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/best_android_phones_for_gaming_under_15000.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/entered_apprentice_catechism_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/cell_structure_and_function_worksheet_doc.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_off0001049c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049C 5212 bytes
SHA-256: f620024ef0d87c0b6d62476e832a2798f0124ebe74d84b6eb0a8dadfcb3179ac
font_01_sfnt_off00011669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11669 11740 bytes
SHA-256: c75cc0a2b19746f8c0d15543a29e4d19de4428b044a4056ef34d108225ef3c5d

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