Malicious PDF — malware analysis report

Static analysis result for SHA-256 97bba249ada1cf44…

MALICIOUS

PDF

103.1 KB Created: 2021-06-20 18:28:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 025e26c19636425e9643814ef68763e8 SHA-1: cee4b0bd9d3a0f54d6416ed2dcff151c2a818384 SHA-256: 97bba249ada1cf442001248e7440d39abc0dc40407275cfc580b108b8c4252df
196 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with heuristics indicating it's an advance-fee scam lure. It contains numerous links to PDF files hosted on compromised WordPress sites, suggesting a link farm designed to distribute malicious content. The document body, though heavily obfuscated, contains references to free movie downloads, a common lure for such scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5c8654989---71517091857.pdf
    • http://upperdublin1970.com/clients/3/3b/3b2fb281f4756d03d37a29c41a8c1d95/File/70457493346.pdf
    • https://businesslife.com/content/file/fajetadenoniwugi.pdf
    • https://stillwaiting.org/userfiles/file/fulipepomufefam.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982be770d98---46583654178.pdf
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/6d0vlil0cochc2j50fk4mirie7/rosanurugip.pdf
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b453c78c7---82616667757.pdf
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/5da62995c3cfe5abbb53cdcba6a3db94/kedazutanim.pdf
    • https://mamadona.ru/ckfinder/userfiles/files/60563211307.pdf
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/air9o5299ppgk4b7ptam96j8j5/28374443956.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8bf526335---98240556476.pdf
    • http://ansonseatery.com/uploads/files/95298597299.pdf
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16090322f9a76d---14753956157.pdf
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/04ec8f7c07d49bbb24e4dc7f62241213/kubokarajumomaza.pdf
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/1d3c9517fa56fa12de9e31e108fa7893/xapadesuwasafagexuriwanup.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160752b4590873---pemogekenawurud.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=twilight+breaking+dawn+part+2+full+movie+free
    • 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
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0001662b.bin
251ea6b9bd683ac6a722a3041247bc8db6f2f7335eaf32f069eb70a798a49439
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1662B 22012 bytes
font_00_sfnt_off00011c5c.bin
546acd1a5a47648eedd65b65f2bc63d7c13a5797fedbece43ef8ae6b2ec800f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C5C 2988 bytes
font_01_sfnt_off0001270e.bin
008d1afcbba3087c11e14794e335350f5fc6e029894023aa3f8b61957b6be806
pdf-font-stream PDF embedded font (sfnt) at offset 0x1270E 5716 bytes
font_02_sfnt_off00013a6c.bin
65b5282682351649f81a7fd9862c56f03dfb86f3457ca2e2c71a08bdb8e77181
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A6C 13720 bytes