Malicious PDF — malware analysis report

Static analysis result for SHA-256 46b8299bfd5054cb…

MALICIOUS

PDF

84.7 KB Created: 2021-06-30 22:43:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 84237cb829063b3d78a57ad39937f6bc SHA-1: 4cbdae45e486d5420e3de357264210c68c54fd85 SHA-256: 46b8299bfd5054cbf9a8b8bd933d47a1a467703a24ad11865220e458c7bd459a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of multiple links pointing to compromised CMS upload directories suggests a phishing or malware distribution campaign. Although no scripts were directly extracted, the PDF structure and embedded links are indicative of a social engineering attack, likely aiming to deliver a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/t8btql7121tc599a9a0srhb1u0/mesidozivawofo.pdf In PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608a49b656bb4---97000183875.pdfIn PDF document text
    • http://wjvanderheidedienstverlening.nl/uploads/file/80798583859.pdfIn PDF document text
    • https://bselink.com/userfiles/file/wegevifus.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/68c1e973c4e38f7148e6e52d8dbe56fd/katusumaxe.pdfIn PDF document text
    • http://shopexpert.com/app/webroot/files/userfiles/files/norevusisizedaza.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/fd94ddc0d9ad7c7085eebbe4985cb083/pefelirakegekekoj.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6294c5aeed---92120309299.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/f401ndlh4hp4cchknpkf8rd0l3/kakopemezawoxora.pdfIn PDF document text
    • https://camping-du-lac-dijon.com/fichiers/68404172363.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/33299267528.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160949f0d4fd24---kerasikule.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/43d41m5u60l4mh97crk99qec29/pojasovosobesage.pdfIn PDF document text
    • http://imi.vc/upload/files/12701853601.pdfIn PDF document text
    • http://ventilatoryzlin.cz/images/file/68271244153.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/7pn79p0pf38u21io0o6ts987f4/61966631994.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/4635be8b7ec357395773c5c04483c5cb/42656119383.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160942960877eb---44891176478.pdfIn PDF document text
    • http://creative-format.com/upload/editor/files/zupidubulutuz.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606e61671664e---72572490471.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=nyc+driving+test+questions+and+answersPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE597 17648 bytes
SHA-256: 785806d27bf10cdcaa6b61dd4b1d6f284eb2a51b9149981dfe0f10f37fed39b7
font_01_sfnt_off00011427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11427 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C3E 10988 bytes
SHA-256: 2769870f9dee1b562b8174b4e8273a134b0e72b77d9803dc33253d720a551ad1

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