Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd241fc3707d526c…

MALICIOUS

PDF

368.4 KB Created: 2021-06-11 17:24:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 07664147adf577f8678ef01e7d7207de SHA-1: 41e8579823debe4e0b3eac8f7aa4b6c08736f9ed SHA-256: fd241fc3707d526c80e66c722ae8f390b4359b2878293c158b05a479cac0c1c7
182 Risk Score

Malware Insights

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

This PDF document contains embedded JavaScript and multiple external URLs, including one identified as an SEO redirector for a 'free-download phishing' lure. The document body, though heavily obfuscated, suggests a lure related to downloading a psychiatry PDF. The presence of embedded JavaScript and the nature of the URLs indicate an attempt to redirect the user to a malicious site, likely for phishing or to download a secondary payload. The ClamAV detection further supports its malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9843

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
  • 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.
  • 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://huntic.ru/uplcv?utm_term=first+aid+psychiatry+5th+edition+pdf+free+download PDF link annotation
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c79cb806e9---vefozagasoxutigej.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/462bf6e1b73671a971a3157a93463113/genebugizomemifafasuwaniz.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/kifare.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f80e9adab4---37256321904.pdfIn PDF document text
    • https://stiff.pl/ckfinder/userfiles/files/tulenowete.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/gavotunisuzetumutizewi.pdfIn PDF document text
    • http://playeasypiano.com/resources/fck_images/92406976009.pdfIn PDF document text
    • http://zoltysnieg.pl/pliki_wyswig/files/1789143496.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074567c5046b---kedefamefepawip.pdfIn PDF document text
    • http://beytarimcilik.com/admin/editor_resim/file/36802287026.pdfIn PDF document text
    • http://donkaew-furniture.com/ckfinder/userfiles/files/87464265293.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/6b1a98ea0de134c4d7a1ae09aabb9bee/63074767361.pdfIn PDF document text
    • http://arserwood.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210519145007657683rr1o2n.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1d342c91f---vawagikepesubopininim.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/0581e910c1bbad1872dedece14c3a167/60917445186.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609dfd094adfd---50307444561.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • 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://scripts.sil.org/OFLIn 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_off00055df4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55DF4 5516 bytes
SHA-256: 0f4553ce89e5c675bf325f024fa37d415bf5d6ec89d42d04ed997a8cac113ecc
font_01_sfnt_off000570d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x570D3 13056 bytes
SHA-256: a3e3d4aaa9a63af49b51d9503d5467fe957de6088fc303378de11bd5fe4162bb
font_02_sfnt_off00059cd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59CD1 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

Open this report in the interactive analyzer, or submit your own file for analysis.