Malicious PDF — malware analysis report

Static analysis result for SHA-256 01e5c9f01460c223…

MALICIOUS

PDF

77.2 KB Created: 2021-06-09 21:53:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: ef6c68713ae6dd449b8a451c24e2b6a9 SHA-1: 2635d6ea567bbb96cf6730481048164f376aa97d SHA-256: 01e5c9f01460c223aae19fabae06f6a59b2aac20314776fd4896137c58070364
164 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites and disposable hosting, suggesting a link farm designed to distribute malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to 'My hero academia heroes rising free to watch', likely a lure to encourage downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://garglob.ru/uplcv?utm_term=my+hero+academia+heroes+rising+free+to+watch PDF link annotation
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/4258c8dcakk3pao171lqc4lsr5/korokoxo.pdfIn PDF document text
    • https://hasekei.jp/userfiles/file/19010684213.pdfIn PDF document text
    • http://www.deep2001.com/images/library/File/55401215983.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092b4e4b5dee---vodunobiravubax.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd9b11b788---xovawodudiwegugalega.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160abcad2631b5---wazosaxadiruwanajolag.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c09d9a0111a---68699718082.pdfIn PDF document text
    • https://clickkedai.com/userfiles/file/34269328396.pdfIn PDF document text
    • https://amd-export.com/site/upload/file/86876908435.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/thcv6h7gu8jom3k2uuesbfkb76/fulowabinojipim.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/vokokatajanupipaf.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a840570566d---sonomoruvaratevewavesuj.pdfIn PDF document text
    • http://almar-bus.pl/userfiles/file/dudalabesitotoparik.pdfIn PDF document text
    • http://vswet.ru/f/barafovazewa.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB8 5940 bytes
SHA-256: 1fd8995879edafe029d7f0ecfa4b12726b787c1bc32452346d2aa0f0c59dadd4
font_01_sfnt_off0000ef16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF16 5600 bytes
SHA-256: 7149e2d9e271d9b1afd2866fb9ace36fd58ed2e36f0eb5795a831bcd1f4bcc57
font_02_sfnt_off00010215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10215 11300 bytes
SHA-256: ffbfcd24cf1b3d0c74f89bd82e5965ecdd905d5788948eb55af5620c52803481