Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfe7dee290826384…

MALICIOUS

PDF

77.7 KB Created: 2021-09-23 01:50:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 01648902af22a721582e040aa494636d SHA-1: 00391eb208c459964b6e996e1b84ed874153703b SHA-256: bfe7dee290826384e109f2c48a742a37b00063288cfa9311a3c43dd3e1f6f5b6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to various domains, suggesting it functions as a link farm designed to redirect users to potentially harmful content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates a malicious intent to distribute links across many domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://xn--80aaa1acmiejxr6d7fg.xn--p1ai/data/files/xuvilexafimuluxilibulawup.pdf In PDF document text
    • https://tradingphrases.com/userfiles/files/29629712179.pdfIn PDF document text
    • http://ngocminhcnc.com/demo_thietbimay_24_7/upload/files/79846651885.pdfIn PDF document text
    • http://vibrobeton.by/pics/files/74452022405.pdfIn PDF document text
    • http://panova-art.com/files/file/31133059950.pdfIn PDF document text
    • https://hamayeshniroo.com/shop/file/dixeni.pdfIn PDF document text
    • https://tsegypt.com/file/raxevijowowanelevuxa.pdfIn PDF document text
    • http://mientrungland.net/uploads/image/files/gekawerodatonifo.pdfIn PDF document text
    • https://www.osteopathe-montpellier-sud.fr/ckfinder/userfiles/files/lubukoj.pdfIn PDF document text
    • http://tolltisztitas.eu/userfiles/files/60093851729.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/0eb0u52cqik2f46cl5fptmgc65/tovogejexulaga.pdfIn PDF document text
    • https://bak.vn/upload/files/37696297097.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/75910174221.pdfIn PDF document text
    • https://pima-alarms.net/slicice/file/27512128716.pdfIn PDF document text
    • https://cleartunemonitors.com/ckfinder/userfiles/files/86878191162.pdfIn PDF document text
    • http://markaz-e-durood.com/EditorImages/file/kekekupibosuduvibide.pdfIn PDF document text
    • http://pskov.agisinfo.ru/uploads/content/files/sozugas.pdfIn PDF document text
    • http://e-district.org/userfiles/file/bukobip.pdfIn PDF document text
    • https://anbc31.iscriptscloud.com/app/webroot/files/file/37758374421.pdfIn PDF document text
    • http://cnhhgj.com/upfiles/userfiles/file/75935782723.pdfIn PDF document text
    • http://cjmfgxfollow.morefriendship.com/upload/files/93551856777.pdfIn PDF document text
    • https://www.creativetalentnetwork.com/ckfinder/userfiles/files/wimazafozojina.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=gold+rush+gold+empire+mod+apkPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC584 19336 bytes
SHA-256: 78a38b4902a8251fa0cdb565acbffa4738ade1a097aeb14c28808f3647ea179a
font_01_sfnt_off0000f80a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80A 10868 bytes
SHA-256: d2c42dfb253e34f2d6a7a77ebc07b0e38cd0698b62f94610f55faad7f16ce44d
font_02_sfnt_off000110ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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