Malicious PDF — malware analysis report

Static analysis result for SHA-256 205cab3f2f0247c4…

MALICIOUS

PDF

85.1 KB Created: 2021-09-17 11:25:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 39b11bd60e9fcef0b078e37612f3cf9d SHA-1: 9d05e2c83fbfb56c3622fdd2b2ce0f60052b1c32 SHA-256: 205cab3f2f0247c4f85d5fa820f4e89f116b19e8ac57199e815a1c15fabafcfa
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document is identified as a malicious phishing and advance-fee scam lure by multiple heuristics and a machine learning classifier. It contains numerous links to potentially compromised websites, suggesting an attempt to redirect users to malicious content or phishing pages. The ClamAV detection further confirms its malicious nature, classifying it as a Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://www.sictombbi.fr/ckfinder/userfiles/files/7249313011.pdf
    • http://tccsrl.org/userfiles/files/57046119599.pdf
    • https://korovin.org/site/img_ufiles/muzuwodojolikola.pdf
    • https://yourownadviser.com/ckfinder/userfiles/files/superirewurutajorubeloxu.pdf
    • http://irs-messtechnik.at/upload/7034293181.pdf
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613f4c5b11a18---78792191714.pdf
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613176b5a35f9---kebepipumupa.pdf
    • http://logicamail.it/draft/media/mebupaponuvufuxuwixipuvup.pdf
    • http://chickenwild.com/upload/contents/images/images/gokenine.pdf
    • http://dailythang.com/userfiles/files/43916245128.pdf
    • https://hobbes-group.com/upload/files/21288178415.pdf
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/199462d3b6ce28b30f634de605d41cbe/25441030341.pdf
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/8a6b0cb8a05109e7845b7f8bc06b546b/47259102730.pdf
    • https://associazionebriciole.it/public/file/soxubo.pdf
    • https://herfection.herfection.tw/upload/ckfinder_temp/files/20210908175714.pdf
    • http://inbond-cn.com/userfiles/file/vexenovegobuzudoli.pdf
    • http://csc0351.com/userfiles/file/20210916142346_iwtnb3.pdf
    • http://chochosanencino.com/uploads/files/raxexowafiv.pdf
    • https://tlproduct.com/userfiles/file/losuzawodabitugupix.pdf
    • http://studioambienteterritorio.it/userfiles/files/rebisifewiduzesirexubikox.pdf
    • http://studiotecniconuti.it/userfiles/files/6297336340.pdf
    • http://cgemfoco.com.br/ckfinder/userfiles/files/zazaxowelowarukurot.pdf
    • http://furniture83.com/upload/files/96113014304.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+hotspot+ipad+to+android+phone
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e828.bin
835722949975a42a7e98279e68ca59d26e282a117cf7b54707940772074b95a3
pdf-font-stream PDF embedded font (sfnt) at offset 0xE828 17620 bytes
font_01_sfnt_off00011644.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11644 16792 bytes
font_02_sfnt_off00012e5b.bin
252adb035b0bd29367d38e2059d14fdb787381b09eb0ab2b8786df9521aa09f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E5B 10520 bytes