Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e0a5aade12f71f0…

MALICIOUS

PDF

84.8 KB Created: 2021-06-26 06:15:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b24e560b7eab3b8a9f29df5a211e61c2 SHA-1: 1f7f3939edf6171aad796df1daf474d80421970f SHA-256: 1e0a5aade12f71f0556e430077a9df665de13d2f5d7d6bcab896a34606bc6db9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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.
  • 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://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/f4fc3f13902c72559712a18115483899/rosinazulaj.pdf
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/a53d1519a3794a30f50f71ff6c7e0286/19543750919.pdf
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bc7aa17dee6---larobejobigubanukonapu.pdf
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/16071cd8b5f0e0---8656866417.pdf
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/084c8779814511f9cc3ab1d8d7113665/82208119590.pdf
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/9185a1a9ea38926cebe0d978044dace6/bibupejavaxizefapawe.pdf
    • http://adabaskimerkezi.com/upload/file/gapelon.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160830fce536af---17716425625.pdf
    • http://ifa-astrologie.de/userfiles/file/xojoso.pdf
    • http://wallsfamilyreunion.com/clients/876683/File/dewebu.pdf
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/9f82118381f59f0a99c747264ce6dd9f/tovat.pdf
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/palutawatuka.pdf
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16093fcc641e8a---20121644420.pdf
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/a6f5978fba7df09ee2d9888e1c19c7fc/28677943848.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e534b758fc773f12cc9f786902b8df53/25110546074.pdf
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab6927bc95---70726384964.pdf
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b3cbaac98d6---21485958305.pdf
    • http://bumsnab.ru/uploads/files/23683278170.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160783abda6da9---86314765143.pdf
    • http://planetamama.ru/files/file/binerawiwadiz.pdf
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2415ce22a---zepebavavipen.pdf
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b0453eefbae---wevofulowidovorapulapix.pdf
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/cd71d2c586519a553e73208315f8694a/87716262084.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=alleviation+in+a+sentence
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e888.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE888 16792 bytes
font_01_sfnt_off0001009f.bin
0c469eec0fc7d2dd530140efc2a3d6665b9d71a1b47b899c1a8e8e618292a23e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1009F 10168 bytes
font_02_sfnt_off00011792.bin
8d7b25de91f6823ed0f4b796e752d17cb0d289b17b46e333ff895c72620f14cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x11792 17416 bytes