Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ac03ccee031cfcc…

MALICIOUS

PDF

428.8 KB Created: 2021-07-06 23:48:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d662a88e76f2d6ed78986d12823e3a94 SHA-1: de15d82a9eb40b778d53ee40ee84b51c39ec26aa SHA-256: 0ac03ccee031cfcce72b5b2392f8c51d3d4a224ab3675c42d60ea4855c471b56
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and ML classifiers flagged it as malicious. It contains numerous links to compromised websites, suggesting a phishing or malware distribution attempt. The presence of PDF-specific heuristics like 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' further supports this, indicating the document is hosted on potentially malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7549

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.
  • 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
  • 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
  • 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://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/slo70sm4k0n5h803gpa6kh4kci/vugexetalizudowag.pdf
    • http://weilandensemble.nl/ckfinder/userfiles/files/kigugutotogi.pdf
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfe72fbb914---30308940738.pdf
    • http://ventilatoryzlin.cz/images/file/22839730103.pdf
    • http://thegibbsfamilyreunion.com/clients/d/d9/d929505c7faf6263097cc97620c39d65/File/5037377064.pdf
    • https://majorsagilekvaros.hu/uploads/file/mewubosefeturonopota.pdf
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/m4i6jsfo7btalh4e298gu30c34/61321363449.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160762926239d8---61894476779.pdf
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/264dafeafe7c0bea543def956a90e0b7/wiradikev.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608532d430bea---lonixarinupeg.pdf
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/d034fb349e13e7e9144dadd4bf169418/4602734445.pdf
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/fa2ba0153e81763d0a70f8490d1de212/97583983372.pdf
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/1bv8agpqlsum588g6j0eark1do/75332566979.pdf
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bc72ff321e6---nuvevivuxisewozob.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608abbd267c4a---73572890908.pdf
    • http://cnpair.com/userfiles/file/25031923505.pdf
    • http://besttailor.info/ckfinder/userfiles/files/bebomutuzozovojot.pdf
    • http://cortabellanews.com/userimages/fekadiduj.pdf
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bec5cad40e3---93671161040.pdf
    • http://cambridgekapurthala.com/damana/userfiles/file/vufituje.pdf
    • https://affordans.com/ckfinder/userfiles/files/visofivafufinatosase.pdf
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/16083a45025c9f---zibisepaforedodo.pdf
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab934076c0---rodidegokujuxotixotuvi.pdf
    • http://alibabashipping.com/userfiles/file/13577580788.pdf
    • http://longarmacademy.net/fckeditor/userfiles/file/gofewubowadunew.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=practical+aviation+security+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_off00063e57.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x63E57 16792 bytes
font_01_sfnt_off0006566e.bin
6be6077f8f3597d448c52dae7c20f5ac8f5226c720ee2031952e2846bac1c3f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6566E 10892 bytes
font_02_sfnt_off00066fc8.bin
bf85ce1a90eee3e3b68871d63fc869bf2df12e7c8fafdbc9772bbbe919639360
pdf-font-stream PDF embedded font (sfnt) at offset 0x66FC8 20236 bytes