Malicious PDF — malware analysis report

Static analysis result for SHA-256 04f5b663bad2dcf0…

MALICIOUS

PDF

94.0 KB Created: 2021-03-03 12:35:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: e75f6204afcba810523df4f8e70f74a9 SHA-1: c1f67cc2a8f2bcad280ddac4f330f8347aba5a10 SHA-256: 04f5b663bad2dcf09b0bac7f4186f4e4ac7f6d23161da552441435706b76d0a0
164 Risk Score

Malware Insights

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

This PDF file contains an XFA form and is flagged by ML classifiers and ClamAV as malicious. It includes a large number of external links, indicating it's part of a link farm. One of the primary URLs points to a resource that appears to be related to CFA exam topics, suggesting a lure for users searching for financial information. The presence of XFA forms in PDFs can sometimes be exploited to execute embedded scripts, though no specific script was extracted in this instance.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • 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://resalured.ru/award?keyword=cfa+level+1+topic+weights+2021 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4408461/normal_5fe163af3e8fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473384/normal_602d4190e9681.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485310/normal_6002914615f38.pdfIn PDF document text
    • https://dudidupu.weebly.com/uploads/1/3/1/3/131380390/a0f0cdc5aa60d.pdfIn PDF document text
    • http://ruwemipuwev.mypressonline.com/yoga_mudra_benefits_in_hindi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379744/normal_5ff7831d6d423.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489050/normal_601f920323fa5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473903/normal_5ff665b6509e5.pdfIn PDF document text
    • https://remezimivof.weebly.com/uploads/1/3/4/5/134582621/vetoxo-dedaj-nivepu-rinix.pdfIn PDF document text
    • https://mipirizu.weebly.com/uploads/1/3/2/6/132682564/3830747.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482207/normal_5ff5312d65900.pdfIn PDF document text
    • http://xorabawik.medianewsonline.com/89473235550.pdfIn PDF document text
    • https://nijomusuvul.weebly.com/uploads/1/3/4/6/134671469/ridewerowitozido.pdfIn PDF document text
    • http://sugameloxufe.mywebcommunity.org/vabigigupivududilibaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444864/normal_5fd7daecaa4e4.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/bulozor/conceptual_physics_lab_manual_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/dvsa_mot_testers_guide.pdfIn PDF document text
    • http://jisijuvod.myartsonline.com/practice_8-4_more_multiplication_properties_of_exponents_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zexozavo/report_dangerous_driving_metropolitan_police.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011d4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D4C 5564 bytes
SHA-256: fe76330519bf466ccef30b2a201f4eef14b9605c419cd697a930821c62331a62
font_01_sfnt_off00013058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13058 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off000138e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138E6 15432 bytes
SHA-256: 22f291cc05f06438197265d2c6d71a5f1fff0d6c5b98fe9935a05c9f56e07527

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