Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a3387cabdae57c6…

MALICIOUS

PDF

85.4 KB Created: 2021-08-13 15:26:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: f598a9dc42033e0dadf1b6f32a465dcd SHA-1: 13928ba413a7cb3dd3625ba79a2157c98281c65f SHA-256: 0a3387cabdae57c6dbd8cbc318664e8b427eca534a4e81bdac503884a0c8196a
176 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a link farm pointing to various domains, many of which are hosted on compromised CMS upload directories, suggesting an attempt to distribute malicious content or phish users. No scripts were extracted, but the presence of numerous external links indicates a redirection or download attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://classicalgardenfountains.com/uplds/file/4255351753.pdf In PDF document text
    • https://planet-for-events.de/userfiles/file/74249781667.pdfIn PDF document text
    • https://salvatoredivilio.it/userfiles/file/visitetadakijozutiwopefu.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a5ed395c4be---90562852090.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/20dc2f1e14e493663b6f78cb3976e18f/totow.pdfIn PDF document text
    • http://przedszkolenisko.pl/userfiles/file/37821197698.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607956e20bd5e---lorasez.pdfIn PDF document text
    • https://bloc-immo.com/images/sabeloxojazo.pdfIn PDF document text
    • https://perfecthospital.org/FCKeditor/file/getivofaxudukidalefaki.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c9935bed6d---nexisafisugozuzapez.pdfIn PDF document text
    • http://mu-rrrc.com/userfiles/file/dijazexi.pdfIn PDF document text
    • https://argumentua.com/i/file/vijujaju.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/d838c48pmt2fkcfm5jum7nla24/fowimutumubokafokama.pdfIn PDF document text
    • http://architettodrabeni.it/userfiles/files/gozegab.pdfIn PDF document text
    • https://dm288.rs/slicice/file/37180487620.pdfIn PDF document text
    • https://dakhoathienhoa.net/images/files/zapamobekimajafododusute.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/d1bhle6vsbkudafd80l8cchfp5/68284414166.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/wuxowamol.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/1ihlg83np6ht6tqcqfrfbvfh7o/58212530459.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a871c98cf11---25775874904.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f606a41e32---41795363944.pdfIn PDF document text
    • http://zwickerfoto.hu/_user/file/62818905400.pdfIn PDF document text
    • https://www.champagne-auge-dascier.com/ckfinder/userfiles/files/kedinopukudosopadedujejak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+install+tp-link+tl-wa855rePDF 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_off0000df05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF05 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f71c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71C 10792 bytes
SHA-256: 4b8d47412d4cd9570b3ccd1ae861c9fc44f22de848a2a431d32813a371c0fc92
font_02_sfnt_off00011035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11035 21424 bytes
SHA-256: 8b3a9ec578adbec4a64b1214a25f24e4e04c3849c077722b70fdf1a93162ca37