Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e6412e44778e478…

MALICIOUS

PDF

243.6 KB Created: 2021-08-09 19:26:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 1b8ec38dd017d64c4573dbcb76b7e405 SHA-1: d563cc2c66cf1657b6715a495eead5c9547cb0b1 SHA-256: 1e6412e44778e47852ac4799079e5a39003daaea9e9bc9ead0ab5b4f7eed8e5b
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a PDF containing embedded JavaScript, which is a common technique for exploiting PDF viewers or delivering malicious content. High-severity heuristics indicate that the PDF links to external compromised WordPress sites, likely serving as a lure for phishing or malware downloads. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160727e8730930---piles.pdf In PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a266763bc2---vemeriminogutomerixo.pdfIn PDF document text
    • http://alexforstarlight.com/clients/4/41/4125d763bdae894b2c088b8c4c0f4705/File/muxevekedomuramojodawupu.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16108497e205e3---15374749074.pdfIn PDF document text
    • http://svaz-podnikani.cz/files/file/labewotemuwemobujugamepi.pdfIn PDF document text
    • https://a1-recruitment.fr/v2011/Files/fck_upload/file/jikorezibuverexo.pdfIn PDF document text
    • http://aviteksural.ru/admin/ckfinder/userfiles/files/50394795873.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/bd037ddd62373572a834c35c420ad65d/lalapisuzefotomo.pdfIn PDF document text
    • http://brandweeramsterdamamstellanden.nl/userfiles/file/finubixovelekugaveroda.pdfIn PDF document text
    • https://drsubhashawale.com/ckfinder/userfiles/files/kajizakuvimowes.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d245209a4b---15366655176.pdfIn PDF document text
    • http://spadhotel.com/basefile/spadhotelcom/files/16962494120.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/fbc405f708b83dc24f03373ae8c01cc8/ronarop.pdfIn PDF document text
    • https://kanat.com/upload/ckfinder/files/71471045335.pdfIn PDF document text
    • http://lexus-custom.com/js/upload/files/95107054618.pdfIn PDF document text
    • http://heydarbaba.org/resimler/files/64000221091.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f6f0cf1b07---30098762422.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16096251fc5b16---taxuvoxugimesefitoj.pdfIn PDF document text
    • http://qca.ch/userfiles/file/74203637649.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/vutiri.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/ghtkhe62o4nku1m0smtj6537sb/lifidoku.pdfIn PDF document text
    • http://stadtbild-intervention.de/Quansis/ckfinder/userfiles/files/1048157949.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/2d2fac975c2c7a7754cfdcb99ff62b8f/87078294950.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=orange+simple+toggle+sprint+1.8+9PDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00033cff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33CFF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00035511.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35511 18344 bytes
SHA-256: 2692f7124f1dd4bb516734e247ee5ae2fef2bdb910e82355124d402a92c38f1f
font_02_sfnt_off00038594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x38594 11112 bytes
SHA-256: 081b472067d3d5e85dce098df55336af97a063c4757622844e42caa8e11e5507
font_03_sfnt_off00039f87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x39F87 10208 bytes
SHA-256: def4a98ea337459a12bd4cdb7b8df099a2208fc428fa83604f472930adb7cdf0

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