Malicious PDF — malware analysis report

Static analysis result for SHA-256 295d7eb5832fc7b1…

MALICIOUS

PDF

87.7 KB Created: 2021-07-12 22:19:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: fe296e89ccb6512dc5d26c8b01c4601b SHA-1: 15777e623078768d3ebc243201ed2bee2c656f2f SHA-256: 295d7eb5832fc7b18e64b08ab15eab866adde2497935c25a249867dd98c044cf
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm hosted on compromised CMS uploads. The document's structure and embedded URLs suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious intent to exploit user interaction through embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b27a97c2604---38945564121.pdf In PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/e611c58e729584bd419804f25661706e/zafupodefekujoteriv.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160726a82362b7---43967943879.pdfIn PDF document text
    • http://goldmustang.ru/files/files/mivagujivol.pdfIn PDF document text
    • http://a-daily.jp/app/webroot/contents_img/files/lujulezijilanawovubizaga.pdfIn PDF document text
    • https://arket.io/wp-content/plugins/super-forms/uploads/php/files/mli59ef2fdfmbtpt8had3h17ev/44636901013.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606d550f63ee9---69348449595.pdfIn PDF document text
    • http://jonme.net/ckupload/files/20875418864.pdfIn PDF document text
    • http://ronaldtan.nl/images/photo/23297170709.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606c96b9a6434---87090309978.pdfIn PDF document text
    • https://iamtimeshare.com/userfiles/file/rowugesavekanolodila.pdfIn PDF document text
    • https://ctapigroup3.com/contents//files/19307133252.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/dd3a716a3123923e1afac1919d4b53a7/30158147553.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/visoru.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160924a5cb0fb9---jenurumefobiwuxiluzodoso.pdfIn PDF document text
    • http://ttlh.vn/storage/ckfinder/files/59020148129.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/329933ba825c3517d2fc7a679c108add/81077476589.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/d57b2bab8c1920f7077a95931c3ddd8e/48809831082.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/amsngn66jie89l2cr3pn023grt/41377276446.pdfIn PDF document text
    • http://summithigh75.com/clients/867147/File/17083186377.pdfIn PDF document text
    • https://tramtron.vn/uploads/files/files/95417898182.pdfIn PDF document text
    • http://royalwedding.jp/images/blog//file/dedaxaja.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/bfb33a8f40b2248cf74b006cd8815d81/tebupufusikonep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=omission+pale+ale+abvPDF 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_off0000f17d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF17D 18536 bytes
SHA-256: 39bac0d2997bd40e0b32ced98d9ab3c903485d6f65f87a933271e11a9cb07180
font_01_sfnt_off00012244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12244 10448 bytes
SHA-256: c4320607e48bb7cc151844ef98c7b16e5870cbbf2ea294a760d4dbca38b1f4cf
font_02_sfnt_off000139b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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