Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2e08a8a5fcf3c5a…

MALICIOUS

PDF

89.6 KB Created: 2021-07-07 20:44:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 82b3fec37fb3daa4866988331a39c291 SHA-1: 5f2edfd75b374c3baf04722af0a06be737864b37 SHA-256: e2e08a8a5fcf3c5a6ba7e259f0c945b12baf6b4668890a2eff3fb0b548519da4
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. Heuristics indicate it functions as a link farm, with many URLs pointing to compromised CMS upload directories. The document body is unreadable, but the presence of numerous links to potentially compromised sites suggests an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • 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://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/fa1b8ff71e7cf27cd87acf13de490a6e/lulutarutesilewowafod.pdf In PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086bd35b4ae6---nuvajimep.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608945962cab6---lazogupi.pdfIn PDF document text
    • http://4bx.pl/public/file/18577203979.pdfIn PDF document text
    • http://stauarchitetti.eu/userfiles/files/nunuwakojupivuxawoloxi.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/6dde7f2992081251ed87cfa9e61353f1/18755104139.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/a1381vicqbe6kodambc4d4lt9l/96901398897.pdfIn PDF document text
    • http://abogarestudio.com/userfiles/file/44165277248.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9c24e399c---gasakagubanisisisitejigi.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c439be714be---90905261439.pdfIn PDF document text
    • http://divorce-difficile.fr/userfiles/file/babunafire.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/hnfqrp2rgjpf8eeqotiq8dcimq/46538328562.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/giferipamewuwok.pdfIn PDF document text
    • http://okuninka-biale.pl/userfiles/file/71533052366.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/4722b1d41e1280054b2ce418955f1e94/12102874701.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/a6bb17cd7d6c32adc1b3a6add7bde5ab/mofikasoxamiru.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd80238ae7---1525542297.pdfIn PDF document text
    • https://actor-conseil.com/files/file/rasobos.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/40c64444ac1ddf3fc59682975f6e175b/xulesetefutoso.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3d0891c51---zufeko.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/wowaraxogusomo.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160e0b62f46d90---vijiwiwu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=learning+charisma+hbr+pdfPDF 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_off0000fa47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA47 17408 bytes
SHA-256: f4dae9d8abd91cd51f30ebbe85ba4d9bf7a83033ce313b27c790cb9989d2c2d6
font_01_sfnt_off00012719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12719 10900 bytes
SHA-256: 7429389a8278619710b51dad4154fde8e2bce300652acf0cb176b82684f019ac
font_02_sfnt_off00013f9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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