Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe2d6ba90e5ca2ae…

MALICIOUS

PDF

81.1 KB Created: 2021-02-03 20:52:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5db0c304a23ef96c5b4801e2db564e68 SHA-1: f00e25d42ebcf25742936dce0b28365e41473101 SHA-256: fe2d6ba90e5ca2ae9ceac8f92d8db39565619acf9d783eb043fd2e78ada21643
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing attempt to lure users to a malicious site. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest the document is designed to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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/wb?keyword=ecers%203%20score%20sheet%20example In PDF document text
    • http://gratoramaa.space/traxxas_link_bluetooth_won_t_connectxyuh3.pdfIn PDF document text
    • https://cdn.sqhk.co/vukupamita/jcBGUjd/pibuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427097/normal_5fd1892db0b76.pdfIn PDF document text
    • https://cdn.sqhk.co/faxinomitux/kWsgfgi/97350001544.pdfIn PDF document text
    • https://cdn.sqhk.co/fegujajox/gcjbMih/72543742771.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480749/normal_5fc59f3be5856.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409095/normal_5fcd6a31a91b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486346/normal_5fdb544483bd3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445736/normal_600219d6de295.pdfIn PDF document text
    • https://cdn.sqhk.co/jugemito/nheZsjg/noliteti.pdfIn PDF document text
    • http://mon-fortuneo.best/gejimanuvafinkul8d.pdfIn PDF document text
    • http://milanomoda-italy.website/astronomical_almanac_202097dl0.pdfIn PDF document text
    • https://cdn.sqhk.co/karadirimose/ijgghgu/bingo_players_get_up_music_video.pdfIn PDF document text
    • https://cdn.sqhk.co/xolokenuw/AdDUvjd/55031897897.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wedalavunobuwe.rf.gd/pesobizeg.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
    • 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_off0000e0b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B9 1656 bytes
SHA-256: cd5c426988b1c832128ffb97e3d5848766849ae52c7ab1e7da5f542808618e76
font_01_sfnt_off0000e8fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FA 5364 bytes
SHA-256: ea141f9553dd85a85cc95b17bd1ab8edb3d181b38b40f4ed08804f78486e09f3
font_02_sfnt_off0000fb14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB14 10932 bytes
SHA-256: 8a7d7efb885f09cc67a55c845572da0a54baed6ee457574a10f7be6bd52064c1
font_03_sfnt_off00012093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12093 16140 bytes
SHA-256: 1b02b7f50665f9cedd1bd4c3140cc65e1ed8fa71feac5c0f046386ded4b17cc6

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