Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca039f70d9a8c9c4…

MALICIOUS

PDF

83.2 KB Created: 2021-09-02 07:35:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: b41872772c7d73797c464c6d9a0b69f0 SHA-1: e70aff4d6f9e584884f87e15bcdfb0edd4ec0b47 SHA-256: ca039f70d9a8c9c463bb168af38ddb79bbc16c50f2f7283174d7de70d7e42e5b
164 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised CMS uploads and disposable hosting, suggesting it acts as a lure to redirect users to malicious sites. The presence of urgency language further supports a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://alfavit.tv/userfiles/file/50159567161.pdf In PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/0541ac42b04e7ba10b3e8c041a93bd1e/dakumiguxubakixiwobaxa.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/nakudevumefusowageza.pdfIn PDF document text
    • http://yuhao-tech.com/userfiles/file/zedilomapulobolexubawop.pdfIn PDF document text
    • https://lawrenceyezersky.com/userfiles/file/41152681743.pdfIn PDF document text
    • http://renknh.com/ckupload/files/rapogaxeradaxetodatuwo.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160982e501f828---23709744431.pdfIn PDF document text
    • https://tanhoaphat.vn/userfiles/file/3780205994.pdfIn PDF document text
    • http://sage-chem.com/image/files/20210828_043849.pdfIn PDF document text
    • http://airelimpio.mx/img/editor/file/dedutagusesedavazumofo.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160740ccd7a65a---13538280825.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/7107c3abcd29e92da1dcd1f35922189e/kowuzisa.pdfIn PDF document text
    • http://point-grey-1970-grads.com/clients/f/fe/fe7686cf254963525dc0bd811951f15e/File/muwuvodil.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/812be9fb43aac5265cef0e7898939521/zisedorusivipexemije.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d70efcb7fe0---wolil.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/f05899880dfab7217b729c36688a7afd/bezuratevu.pdfIn PDF document text
    • https://sukienmiennam.com/userupload/files/wazozulekotage.pdfIn PDF document text
    • https://binarbaidequipment.com/public_html/userfiles/file/tabifenozux.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/e6901781bb25430baf4382f1cf657799/tanelobonax.pdfIn PDF document text
    • https://mednet.mk/public_html/upload/userfiles/file/ratelegupipo.pdfIn PDF document text
    • http://phayaotechno.com/UserFiles/File/kevogafomazilemeke.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=vomiting+after+food+intakePDF 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_off0000dfa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA4 10544 bytes
SHA-256: 2fb00956c2e758efdc3c34b57a31b7142b77e9851dd0940a6814c9f3920cb9a1
font_01_sfnt_off0000f77a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF77A 18144 bytes
SHA-256: eb5bcb00b1b554389ed62c71480eec30b9e565082d037d61d341a4be82bae653
font_02_sfnt_off0001267b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1267B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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