Malicious PDF — malware analysis report

Static analysis result for SHA-256 03ed0ee380bc343f…

MALICIOUS

PDF

83.5 KB Created: 2021-09-02 04:25:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d5129c403a74d428f39c69873ba1e016 SHA-1: e1722b0137490174f8069a0773de35b7f4ef6e24 SHA-256: 03ed0ee380bc343f512a8b37f95c22763e6d90588016ab3568894240fad2b22a
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external websites, some hosted on compromised WordPress installations. These links likely serve as lures for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 6

  • 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.
  • 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://crewmak.ru/uplcv?utm_term=how+to+unseize PDF link annotation
    • http://tjsijiqing.com/ckfinder/userfiles/files/2021/0603/0c87a14d8b6d379bffcbce87b74f8235.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160787f48aa448---10459405558.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16094dbeb2a632---pojenumegobezewukaj.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/94941628f5416f96a664b890f4404abb/13170013719.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/fde8226f41a72e612255eeafd65b2c64/66111179746.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce7cbb88c3---29954596763.pdfIn PDF document text
    • https://network-italia.it/file/gajegugijuxabilu.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607d419d65bc6---lujeribuka.pdfIn PDF document text
    • https://colakcivi.com/userfiles/file/38737832075.pdfIn PDF document text
    • http://cartopack.be/Images/file/lefonafudogebepemaguvu.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609e1ffa508a3---rujebaf.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f62cc7ae24---dewopumomenu.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/42305873260.pdfIn PDF document text
    • http://bacvietexpress.com/upload/userfiles/files/91877318315.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c495c49e788---nuretuxan.pdfIn PDF document text
    • https://kit-veron.my/ckfinder/userfiles/files/fizodijodadetujefijajol.pdfIn PDF document text
    • https://pensiuneavlasin.ro/wp-content/plugins/super-forms/uploads/php/files/ihom3sbdef1a36n45rsacslcbp/xumurinuxodubomipatoba.pdfIn PDF document text
    • http://thietkewebbacninh.com/webroot/img/files/50905896426.pdfIn PDF document text
    • https://pasarantogel.com/contents//files/81079297906.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16082e7f6e9164---40398820996.pdfIn PDF document text
    • http://fw-simple.com/uploads/files/7066836391.pdfIn PDF document text
    • http://xn--3e0b556bhrbowi6undva.com/ckupload/files/baminagotuzoveg.pdfIn PDF document text
    • http://clubesquilacoma.com/uploads/files/17845839368.pdfIn PDF document text
    • http://conganbacgiang.vn/app/webroot/uploads/files/panafux.pdfIn 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://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_off0000e519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE519 10032 bytes
SHA-256: 073e6239500d5b5eff905f7f453c42cf78691177eb20db21318f5e8129b3c784
font_01_sfnt_off0000fb99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB99 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000113ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113AB 16600 bytes
SHA-256: 7f7e257d677d37f9c8527e403f37c084be7eeb9ba743d60d667f1b6426cdc833

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