Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d73f285fddbd21e…

MALICIOUS

PDF

86.6 KB Created: 2021-07-07 00:50:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bb04619afb6869d9586f08373e2cc37e SHA-1: 34412801cb31818fb9834005bcf26b41ac0717ed SHA-256: 0d73f285fddbd21e253582ec0d994e72a83d4f95c7637a5dcbb05a04d57a6dbb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and a significant number of URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 http://northphoenixmustangs66.com/clients/4/4b/4b49b54eec06ebba3741256e9f3e6f2b/File/jaripixe.pdf
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aaef8d5d42---vivexuxevotomevap.pdf
    • http://flexa.cz/docs/file/362189184.pdf
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/44bd66f20eca76522fd2689b4e71457a/numuzirugotoxulexulunag.pdf
    • https://debcopharma.com/userfiles/file/lojozalenix.pdf
    • https://alkalacarservice.com/public_html/userfiles/file/97893124534.pdf
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/984a061033414acb7bb25daa48decddf/73766092621.pdf
    • http://pitin-akutsu.com/js/upload/files/27274700166.pdf
    • http://myphamhelios.vn/luutru/files/96236429189.pdf
    • https://liniagdanskzydowo.pl/files/duzikifejubonogovibit.pdf
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/od6aqdpoid1i1gctfp2lv39f3t/39343812649.pdf
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/75g62oougs28qb2e6pj35nh7k6/18663235350.pdf
    • http://dzstock.com/Upfiles/file/suxewetoparuropasijagesol.pdf
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/vhid23d5nf1gf290hhnkccs7a0/36371663700.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606f98d9911f1---34925584364.pdf
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/069b94ca9c794f911bd409ab44f0b9d7/bawuzu.pdf
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/ed4iur4s1sdgnbi3e6g9elnnd2/nafedufofijewidolibaxove.pdf
    • http://www.knickmeier.net/images/pageimg/file/74844798918.pdf
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/6ac31b3a1d985081f058bd24abe26b14/lusuvarisipexoruzepama.pdf
    • http://afghansolar.com/userfiles/file/rulefuxopetizujelenat.pdf
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/e5ou97hgr8j2iuec16ko188rqg/51164855139.pdf
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609a281bc9290---50275672144.pdf
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/9unahis20cg2nnjgllkgd90p7i/xuxufubibuv.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=icse+class+10+2020+maths+paper+solved
    • 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_off0000edbd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBD 16792 bytes
font_01_sfnt_off000105d4.bin
649ae3829be1366fc3c0d099fae9cbb7623e598f67af3d7720974a88a6e474ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x105D4 10892 bytes
font_02_sfnt_off00011f29.bin
da0864aac31e4343c214eb3742f1890518d5e7dcaa753bea50c25e01cd3ae827
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F29 17472 bytes