Malicious PDF — malware analysis report

Static analysis result for SHA-256 00a34180c5c20a53…

MALICIOUS

PDF

444.0 KB Created: 2021-08-06 16:48:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 094ef63a935ca684c216bdb3ea91e121 SHA-1: f99e1d4d8c350d0b4871c34fa321b19c3a8cc650 SHA-256: 00a34180c5c20a53f2c5dee8890f6a70dff70d5ad42ae7f6db0ed347f28593bf
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to compromised WordPress sites, suggesting it is part of a phishing campaign. The presence of a 'password-protected archive handoff' heuristic indicates the document likely instructs the user to open a password-protected file, a common tactic to evade security scans. While no scripts were directly extracted, the ML classifier and ClamAV detection strongly suggest malicious intent, likely related to delivering a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7845

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/gr311k4nsq5j2qmug9ihq0081m/68040934267.pdf In PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082693581e52---todesimopudogerozuzegipik.pdfIn PDF document text
    • http://xoblates.com/clients/e/e0/e08cfb93fb97b00c28394d0532709dc9/File/fosuzagefejawadawepesovo.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/4b24b6d784894f543c9193d6e1fde8cd/55601903214.pdfIn PDF document text
    • https://weyergans-hcc.lv/userfiles/file/3096546680.pdfIn PDF document text
    • https://eijo.in/ckfinder/userfiles/files/tusof.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160a859903d972---dagejewiki.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/46102338432d1a69f735fb0ed1394a35/pixetijusubopokilepu.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/46099273352.pdfIn PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/p0858n41ic4ll2mpc4r011vr7t/44865874774.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/mifuwonosikulamax.pdfIn PDF document text
    • https://cursosgratuitosonline.es/wp-content/plugins/super-forms/uploads/php/files/85sn31v0e33bkv0nbf9ak6m80i/73235864061.pdfIn PDF document text
    • http://petukmahaaaraj.com/userfiles/file/28322332423.pdfIn PDF document text
    • http://maristaslardero.es/userfiles/file/budovuzunaw.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160afea3900cea---64196841009.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ce5b764b567---gojexososabarimix.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/f16528beb55631bcb361d1b601e1a953/40703766385.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b312f4ca71---giwiferebanad.pdfIn PDF document text
    • http://scheiden-maassluis.nl/uploads//file/28978350795.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a3d4e5cffd1---kunotatigoxukogogojikaxo.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/3a74329e48520b89555f0275dc6e6581/51254892306.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/6ef8f0b10146b7e94c8c539c85a6273f/1728551737.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/65695d10a8b36c68f1446f65a9c53a82/96834482802.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=gumtree+ni+motorbikes+and+scootersPDF 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_off00067b4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67B4F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00069361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69361 18956 bytes
SHA-256: 166fef620fdcff8a39b0a27a4a783d4321d20ceba093888791b272db07a5044b
font_02_sfnt_off0006c545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C545 10856 bytes
SHA-256: ed13ad5d9b8c79903b042892e5728b92088a22917ef0efc33fe403a0361347aa

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