Malicious PDF — malware analysis report

Static analysis result for SHA-256 db1be87b6b0633ba…

MALICIOUS

PDF

80.4 KB Created: 2021-09-10 20:59:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-22
MD5: 24dda6ecd21be06990063dc02f5bfc49 SHA-1: 5dc2325f332b137e93361d6de9da1890df26afe0 SHA-256: db1be87b6b0633ba93739e885e230e4f117c64175107a6cd103a03c8f1e3f664
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://taketty.xyz/js/ckfinder/userfiles/files/42163195565.pdf In PDF document text
    • http://apmnir.ro/fckfiles/file/7606547304.pdfIn PDF document text
    • https://malayalamfoundation.org/admin/my_files/file/88458815628.pdfIn PDF document text
    • https://geneolock.com/ckfinder/userfiles/files/dizomanililajo.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613a52b52e1a3---18607185276.pdfIn PDF document text
    • http://malovanesklomh.cz/images/file/kojowuvobuti.pdfIn PDF document text
    • https://33mobility.net/uploads/files/nasakatedipi.pdfIn PDF document text
    • https://thefertilizergranulator.com/d/files/wogatuduves.pdfIn PDF document text
    • http://mashhadgardi724.ir/basefile/mashhadgardi724/files/vefesited.pdfIn PDF document text
    • http://huiking.cn/uploads/file/021125062235.pdfIn PDF document text
    • http://balalajka.nu/media/3387162376.pdfIn PDF document text
    • http://web-news.eu/www/pkpar/userfiles/file/54772615516.pdfIn PDF document text
    • https://incense888.com/uploads/files/202109041256582971.pdfIn PDF document text
    • https://cmf8.ir/data/file/45457717351.pdfIn PDF document text
    • http://hoclaixebinhthuan.com/upload/contentFile/file/53099811375.pdfIn PDF document text
    • https://proia.bg/userfiles/file/60692387200.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/d21f12d89bbf5f2215aa5ff0042d1a4d/zevesilogolukepif.pdfIn PDF document text
    • http://drkoopman.nl/cmsimages/file/zeridifuxarat.pdfIn PDF document text
    • http://archifolder.com/userfiles/files/22380149025.pdfIn PDF document text
    • http://skmsm.com/userData/board/file/vopapupuresasu.pdfIn PDF document text
    • http://pinturasoltra.com/images/slider/files/sopirifakevaziwodit.pdfIn PDF document text
    • http://formel1vermietung.de/userfiles/file/sepabofewetaranogojal.pdfIn PDF document text
    • http://re-media.ru/foto/ck/files/28207096452.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=what+happens+when+you+restart+your+tabletPDF 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_off0000d5fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE15 10688 bytes
SHA-256: 7bc3b08afe32263e64454e3e4500267203e93fb0edaf03f13a9e00a388441155
font_02_sfnt_off0001066e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1066E 17444 bytes
SHA-256: ee9631097b6fb2403c799ea7ebea8091ce8544bae2d493f276bcaa414896ec15

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