Malicious PDF — malware analysis report

Static analysis result for SHA-256 d902918484c96142…

MALICIOUS

PDF

86.4 KB Created: 2021-07-06 04:34:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 29ea9f4778bebf6fd2baa34da331e56c SHA-1: d06e21f324480b72058f63240117f70a22f971be SHA-256: d902918484c96142dd24493b419aa6e7c169a9c19fe43c18f9db1fe81f925497
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and a large number of external URIs, many of which point to compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing sites or download further malware. The embedded JavaScript is likely responsible for initiating these redirects or exploiting PDF vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://allytemp.ru/uplcv?utm_term=clapping+hands+meaning
    • https://himalayanthailand.com/image/upload/File/jazisegu.pdf
    • http://ahcxdq.com/uploads/file/291953584033.pdf
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/d97a6508e13ea93a74d6780565ddc68a/tevadoxijipukatuxa.pdf
    • http://centralwestwoodclassof1983.com/clients/c/cd/cd4b3c89dd1500142a52f05b9125c350/File/98636237781.pdf
    • http://classicalgardenornaments.com/uplds/file/96875159964.pdf
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/mhg4gbl8f5j39ldd4n4092i2n4/52822232237.pdf
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/d2b4c342c38c7e8d62542060cb5fb4c9/kabozuguvadavazexo.pdf
    • http://servis-hradec.cz/files/file/25828049341.pdf
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b58ba8e8573---96906772367.pdf
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/f9ccff9b4cd7b3f86fe00c705b6d6f29/zeroxawoteto.pdf
    • http://geopraxis.it/userfiles/files/55094030990.pdf
    • http://owv-sad.de/userfiles/files/68986449489.pdf
    • https://fzclicks.com/demo/files/editor/file/55629250038.pdf
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/eue88lbrl88268639jjkn4uis0/49385611200.pdf
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2edc17762---bixefusog.pdf
    • http://elite-weekend.com/clients/9/94/945a7f92a07ecc721aac768ad340748a/File/xiginuramudoner.pdf
    • http://to-kajihan.net/js/upload/files/legawuwo.pdf
    • https://yarpaket.ru/userfiles/file/17650421848.pdf
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/16086a7afdbe05---jinovexez.pdf
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/3943578a4ab1c3a318dd0098a4752ef1/tanadatemudusixokuramoje.pdf
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/b6a5775203242a1a32227e743fa0e2ca/48611296240.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_off0000ecf5.bin
e203dfebe26b806276ad5effc8a20f54e12022d4abcdc63e0991ca2d169ca202
pdf-font-stream PDF embedded font (sfnt) at offset 0xECF5 17676 bytes
font_01_sfnt_off00011b64.bin
f0f405b19b8d6f541dfe7ddbaed75fbff6f9bd4d395142826aa3c096a80b2d8b
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B64 10552 bytes
font_02_sfnt_off000132fc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x132FC 16792 bytes