Malicious PDF — malware analysis report

Static analysis result for SHA-256 17b2ccd4adfed562…

MALICIOUS

PDF

197.8 KB Created: 2021-07-21 05:22:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 147e60a332140911f0553bece0e09aa8 SHA-1: f009bf30ac360e76a99d435b98922f65a25db6f3 SHA-256: 17b2ccd4adfed5627c61e6a5bcf85273c1495445a920f0670ca5c0bcebdd00be
166 Risk Score

Malware Insights

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

The sample was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of an advance-fee scam. It contains numerous links to compromised CMS upload storage, suggesting it is part of a phishing campaign designed to trick users into downloading further malicious content. The document body was heavily obfuscated and unreadable, but the heuristic firings strongly indicate a lure for a fake lottery or prize, requiring payment for parcel delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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
  • 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.
  • 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 https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/go279uggb4h2f9692eie8qi39t/dolabiguzigo.pdf In PDF document text
    • https://amatnieks.com/pictures/image/62211061361.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160c93ecca8630---46452723526.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609a2b109c9e5---kurumimufefeximimepepipij.pdfIn PDF document text
    • http://influences-vegetales.eu/assets/Image//files/25430641494.pdfIn PDF document text
    • https://rocksoliddesigns.biz/userfiles/file/75989980737.pdfIn PDF document text
    • http://teormech.ru/teormech/usrimg/file/97563603252.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/dolapitujilo.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a38e57bb647---kepedirozepapaxa.pdfIn PDF document text
    • http://www.siscbolivia.com/admin/uploaded/fck/file/papopivitogupero.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/f3c12c25cadc9788e0da53124b4b5697/24292629300.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c25264228c5---vubazuloju.pdfIn PDF document text
    • http://duancanhotot.com/upload/files/68712726412.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e5f50550b---xejewikivudonupoko.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3bfde190b3---jegamax.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a305f7a8b5d---53780243810.pdfIn PDF document text
    • http://robbes.nl/media/files/47291638463.pdfIn PDF document text
    • http://kochamsushi.pl/UserFiles/file/43281528714.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160719495e8539---nasibunulofefakepegezix.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/fa59e2a21c3c11e487e043b66b868a32/46139921059.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607b74589e4b7---xakuzaluzoguzovidupebipem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=english+idioms+with+sentencesPDF 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_off0002aac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AAC4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0002c2db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C2DB 10624 bytes
SHA-256: 5948c9759a59ac0b439dafb1d09dd37fb2ae063e67b4f4eee809b3caa681577c
font_02_sfnt_off0002dac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DAC3 17616 bytes
SHA-256: 21af4fb02676ad7fb465ac68bf5fd49850c903ebc150db37142d4eebb7759408

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