Malicious PDF — malware analysis report

Static analysis result for SHA-256 596b08056722ffdd…

MALICIOUS

PDF

117.2 KB Created: 2021-08-12 14:17:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c841e8bfe1d52f6c78819878df9f0742 SHA-1: ecf99ad9775d0d3bba86ee09dbbe6fffb24c5537 SHA-256: 596b08056722ffddc4c780b919f100996b99acfce1e3ac0b1ea7b5bc2ff49ece
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised or disposable domains, likely intended to lure users into downloading further malicious content or submitting sensitive information. The presence of multiple distinct hosts and a high number of links per host suggests a broad distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9873

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://bualuang101.com/backoffice/upload/files/betimokipezoxunemekufi.pdf
    • http://remont-elektro.eu/archiv/file/jatazopumunesizuvo.pdf
    • http://www.derbysignandgraphics.com/uploads/file/11688449537.pdf
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/8bf87b8a12f9105e4f7448a4417ea106/gizinod.pdf
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/jn9c8r0a6bmr9i4v8mpn2aqfa4/58462247504.pdf
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f28246e173---lokibozudowojononatewu.pdf
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c67c115d0c4---xexazodiwaluvazire.pdf
    • http://ttc-investco.com/img/files/17021361395.pdf
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16106b3c912eb8---58382405515.pdf
    • http://robalton.es/Albums/images/file///94449413728.pdf
    • http://saipanbooking.com/FileData/ckfinder/files/20210713_48FEEF5A3C4772D4.pdf
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a8b8e1b753---63484303105.pdf
    • https://ddc-touggourt.dz/ar/files/guwuniwudewu.pdf
    • https://ntc-container.com/upload/files/37927814941.pdf
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607abe5122219---palomoduxax.pdf
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/ecf2cb165008f38be02ca07794c57795/rujaxiwojibitima.pdf
    • https://koratspring.com/upload/file/zemikipapixeserifojakalo.pdf
    • https://editionsitaliques.com/userfiles/file/vanubemigifomugugigep.pdf
    • https://lapalettedesarts.fr/gestion/file/94508779013.pdf
    • http://abwingsva.com/uploads/files/98521081959.pdf
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/4ea83f859682a482b601ede3caedd4da/petuvenizatawafonupuz.pdf
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/6c7ad7bdafca077bf579310e09110e78/zamifipinaxixiluna.pdf
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b28985c9466---82418896976.pdf
    • https://divinesacredshakti.com/wp-content/plugins/super-forms/uploads/php/files/8bf1b58795780bd4c313ac9a694c94d7/jizosafiwojizuxe.pdf
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/261628b9b2a8c2f448e5ee74d3aae5bf/bosakosibojejubewomobul.pdf
    • http://7seapharmtech.com/Uploadfiles/files/58076788375.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=libro+del+popol+vuh+completo+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_off000163fa.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x163FA 16792 bytes
font_01_sfnt_off00017c0c.bin
89030b2e02030663f6804c005dcec9b618942dda1d5c5487e28133d49747c6b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x17C0C 19108 bytes
font_02_sfnt_off0001acfe.bin
c889e321081d5a9b5f85bf059aa73a63040fc42933dec4a7b73b3419850f7976
pdf-font-stream PDF embedded font (sfnt) at offset 0x1ACFE 10716 bytes