Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a88e9a61ce992c3…

MALICIOUS

PDF

80.7 KB Created: 2021-09-19 14:43:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 715c2b21a8fd1d6e6f09655977dd62c6 SHA-1: 30ff179125991674d82e42a5f013daea31d61956 SHA-256: 3a88e9a61ce992c3390e605c1a6bfda4b97bb0b3c41d6f74778138e1ffb5bb17
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and exhibits characteristics of an advance-fee scam, including language related to lotteries, prizes, or parcel deliveries. The document contains numerous links, many pointing to compromised CMS upload directories, suggesting an attempt to host malicious content or redirect users to phishing sites. No scripts were extracted, but the overall structure and heuristic firings strongly indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • 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.
  • 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.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613feeeae2ca6---10205512254.pdf
    • http://radio-salsa.com/php/rs/filesupload/file/22146403314.pdf
    • http://erdbau-rauch.at/9830777139.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/16146e7d88a84d---45513671423.pdf
    • https://anandamsanyal.com/userfiles/file/46649226830.pdf
    • http://www.yeosung21.or.kr/ckfinder/userfiles/files/1631948885.pdf
    • https://asset-books.com/userfiles/file/zadajiluxakuwodefamuj.pdf
    • http://alotercuman.com/ckfinder/userfiles/files/sofigidulira.pdf
    • https://hankilfood.com/upfile/files/63635584011.pdf
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161310e34db34b---41126190082.pdf
    • http://twfbs.com/ckfinder/userfiles/files/31403286887.pdf
    • https://hbphoto.ca/resimler/files/29833380604.pdf
    • http://lnv-cnc.gr/userfiles/file/2353228292.pdf
    • https://chezgregoire.fr/userfiles/96431367355.pdf
    • http://hoadon-dientu.net/images/files/bubiput.pdf
    • http://amoy-art.com/Upload/file/kekevonivega.pdf
    • http://tovicetour.com/FileData/ckfinder/files/20210919_A39CE2A8EAD1A71C.pdf
    • https://produktybhp.pl/pliki_user/File/wototimukako.pdf
    • https://feniks9.ru/ckfinder/userfiles/files/xarosezogepan.pdf
    • http://domexpo.ru/up/file/28303653098.pdf
    • https://audreyheselmans.com/_files/file/87697483753.pdf
    • http://zoltysnieg.pl/pliki_wyswig/files/mozapuropefagokusa.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=before+green+gables+pdf
    • 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_off0000d14f.bin
47d9b21c9e0e6a90bea844a79cf22dd3a31aad9c7cb19e1119ce888fd3518e85
pdf-font-stream PDF embedded font (sfnt) at offset 0xD14F 10676 bytes
font_01_sfnt_off0000e97a.bin
9730c743c615925ddb7ea11d9784cbe2ba5c2d93fa9c6aae2cc185c35a4cb3f6
pdf-font-stream PDF embedded font (sfnt) at offset 0xE97A 19772 bytes
font_02_sfnt_off00011d85.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D85 16792 bytes