Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7c7d85c5fefa9ed…

MALICIOUS

PDF

87.1 KB Created: 2021-08-01 08:46:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: de48747ed9c030e5bd9e887a9e2582a5 SHA-1: 1284c0f3e6b40a1274f725f184a49babf259eccb SHA-256: b7c7d85c5fefa9ed35bc64ba2b1fb109dd8c622026b82938aa4f334d9160309f
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a665671ac52---51307179610.pdf In PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/9e86e0eb6a4f11d0b51afc97ccca4335/70566428188.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607cec688e67c---jovipuwul.pdfIn PDF document text
    • https://12shio1.com/contents//files/toxoxugerutonetuve.pdfIn PDF document text
    • https://vanchuyenduongsat.vn/upload/files/defubuvipuz.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/575d0fff281639b6aee5332274f869ef/narimediganajomexexo.pdfIn PDF document text
    • http://myhomeinparis.com/userfiles/files/39272187391.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/75922963662.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16081ba0013d10---90083507905.pdfIn PDF document text
    • https://aquamedicasatumare.ro/ckfinder/userfiles/files/95061946183.pdfIn PDF document text
    • http://scamps.biz/userfiles/file/37545838429.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/fu32jttubcf3nt4lmc9fmiomg9/surejudeguno.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a95155d20a9---kafolezojifarazukoxokufi.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/74076e14ee89cd67d64b4cd9b0b95ce1/38307253204.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6c375fee1---kowidog.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f06724f47---40842244520.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/bivefenelofegonamewa.pdfIn PDF document text
    • http://urotunisia.com/uploads/FCK_files/file/84172543782.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/cca38cf9fdff146c3948ce69b00ee399/todadoxovime.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/c54a614299f1903c7d82492599416a92/34267445147.pdfIn PDF document text
    • http://norrlandet.se/userfiles/file/55380262439.pdfIn PDF document text
    • https://selispin.com/calisma2/files/uploads/40536040174.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/ff60fa184ecec117359af8c292b642c5/34375524947.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/25968474385.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+use+a+mitsubishi+air+conditioner+remote+controlPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000108b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B3 17104 bytes
SHA-256: e34d4af8cf9eaeea3d10aec871b3a1e73292097d07e5a5f21a4cd05af36328b7
font_02_sfnt_off00013509.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13509 10952 bytes
SHA-256: 58395fa4d879541699161e37d2eaf362226d61bcdc1ac8ffee545d07bc24ae9f

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