Malicious PDF — malware analysis report

Static analysis result for SHA-256 fad69d5fd71ad5ac…

MALICIOUS

PDF

71.2 KB Created: 2021-02-19 19:51:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c98a877886812c9abae5ca93d289a4d3 SHA-1: 778b75f7790375940737cb9fe662358757aa85f3 SHA-256: fad69d5fd71ad5acb8764f2ab1d933e79a38f90c0fbecdd7d9beb4988b75df52
164 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to PDF files hosted on various platforms, indicative of a link farm or SEO spam. One of the extracted URLs, 'https://leonvi.ru/wix?keyword=madden+mobile+hack+apk+2020', suggests a lure related to game hacks. The ClamAV detection and ML classifier strongly indicate malicious content, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://leonvi.ru/wix?keyword=madden+mobile+hack+apk+2020 PDF link annotation
    • https://nuluziberalisox.weebly.com/uploads/1/3/1/3/131379655/2152758.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448548/normal_601ee95216f42.pdfIn PDF document text
    • http://zofazosedam.iblogger.org/pubirakuze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481409/normal_5fe853d0757eb.pdfIn PDF document text
    • https://sesanejaw.weebly.com/uploads/1/3/1/4/131407178/9372730.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424951/normal_5fff3cece6926.pdfIn PDF document text
    • https://rikisefunem.weebly.com/uploads/1/3/5/3/135337995/piwanit.pdfIn PDF document text
    • http://kerefasiputupez.iblogger.org/38507895568.pdfIn PDF document text
    • https://vawenajibafadak.weebly.com/uploads/1/3/1/3/131384306/4370865.pdfIn PDF document text
    • https://lulegosepo.weebly.com/uploads/1/3/0/9/130969478/5816398.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423137/normal_600af2918b00c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xegeduv.rf.gd/watowijajojagonag.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/zojetuzarexuje.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/fijaterub.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/maxutejulofizabafabejuf.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/best_anti_theft_security_for_android.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_off0000d9ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9ED 5520 bytes
SHA-256: 1c6d5395185e1a14ea240ba52e6e38f224af4239006f523332721dc3184a8318
font_01_sfnt_off0000ec95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC95 10324 bytes
SHA-256: e42d44acdfad57f5f71861ef736a8de8721ddadd1cbb762812627391bfcda6d1

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