Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9fccdf5ef012ca0…

MALICIOUS

PDF

86.5 KB Created: 2021-06-29 21:22:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e0fa7aafe73222637f72c021dd02c735 SHA-1: 4c729cd4696a01384ebf5f8077220eb439465f3f SHA-256: d9fccdf5ef012ca0bd21e1df3697e6d0c12aba116b78cb6af3005c82a904aeef
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The document also features a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting an attempt to obscure the true destination or host malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://newtop-eg.com/userfiles/file/59379988491.pdf
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/4189a889f86e274d7d2b6ec93928b6bf/47472277151.pdf
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/ca0073db4e9e12ab8e713b8eb8614a89/gefetomalepipobi.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/4e5d1eecc3b7f41579bea51af6dfa3d5/vemiweruwil.pdf
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cdd2c78866f---16619282529.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160a32c212eebf---tixipaperusigotifamuk.pdf
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/48eeae3ceef08635a581a8226f57afd1/17668171003.pdf
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/12396995364.pdf
    • https://chauphongasia.com/wp-content/plugins/super-forms/uploads/php/files/o08quv3li5ku18pj2l1vbjeq7e/zadelanukumoseg.pdf
    • https://akproauto.com/nbloom/fckuploads/file/dusodipobukemozetedeku.pdf
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1e8bc266cc---65233093013.pdf
    • http://ccapostolicchurch.org/clients/1/19/19d200bce63520a637954fb60b162b1a/File/57593994562.pdf
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/72pai6vja2tldt1melj0rrbid5/57060645084.pdf
    • https://imahima.xyz/js/ckfinder/userfiles/files/nolofasofev.pdf
    • http://axwelindia.com/uploads/84239725355.pdf
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609534407237a---sovozixilarozejosowejeva.pdf
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/c561f3d522592fc62c66c84c44c25dea/vikawe.pdf
    • http://okmarin.ru/userfiles/file/sasolipaj.pdf
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ed6944da43b13a5fb3cc5af467b1f61f/44399300406.pdf
    • https://dialogueinpraxis.net/files/docs/11734695714.pdf
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5fa94f31d---minutokot.pdf
    • https://rybczewice.pl/userfiles/file/xotumekilifumozeme.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b0aead4a1b7---taxud.pdf
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/v11qee3ugob4jdrh35v1kqcsu0/pivexetenaxi.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=giving+directions+online+exercises
    • 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_off0000ee6d.bin
4c22f62357223fe7bc7148d1479e984b32e5220d83f81786fa32920236f5b37c
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6D 17140 bytes
font_01_sfnt_off00011ae2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE2 16792 bytes
font_02_sfnt_off000132f9.bin
af87d31e8f1d27e49c0dbe5e4a56912cf843882c3b87e5ffd57f8de7c8e60285
pdf-font-stream PDF embedded font (sfnt) at offset 0x132F9 10592 bytes