Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ff1f7f0c56e71f6…

MALICIOUS

PDF

762.7 KB Created: 2021-06-30 20:53:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 99d3ff78032d0287be904f30ee130381 SHA-1: a19cfaa1ee7e3d0b7813894d8dfaaa144cc6d708 SHA-256: 1ff1f7f0c56e71f6e88bb52be63cfae043d5e49683f15484ddbb1b281c0660c2
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple external links, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier also indicate malicious intent. While no scripts were directly extracted, the presence of numerous URLs and the 'compromised CMS upload link farm' heuristic strongly suggest the document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5547

Heuristics 6

  • 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.
  • 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 https://queure.ru/uplcv?utm_term=critical+care+questions+and+answers+pdf PDF link annotation
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16093e32ecdc9b---sibonaxevogefoxularifuji.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/p204artpinl6edta0kgcgfi7ci/nurepawoworavo.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160857c9ce8f06---47346569392.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/499add2b3db58ebb28efdffaf4a9f7de/29380641311.pdfIn PDF document text
    • https://10glazsikeyrosa.ru/file/pazenevurokos.pdfIn PDF document text
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/p3jtfpdhh06prd19po8se0vh61/58437715007.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/ee667480d86b46e520695d81fc22d531/12092390018.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b21886f3eab---34736278184.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/6bf6f327fa7eeb611b4c661a3c072343/12190957531.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/1229f1460a7626a2698bbd7a4e71808b/kafuxugawujitezemususi.pdfIn PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/46c624e8e441010c04bd618eb51a5704/2799474753.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160c5b4f715baa---bepisipi.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/f81junbtgcodud4mq8je3cs952/89116294314.pdfIn PDF document text
    • https://bettyloupaints.com/userfiles/files/1539092511.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/d701259fe61c85495501cc9c1f1da404/dunepewikofamadawu.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/cad3963019ab67599585ccc31d450296/xoweterojurawajemez.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9d039467a0---85482047397.pdfIn PDF document text
    • http://lso-msm.fr/userfiles/file/88426456738.pdfIn PDF document text
    • http://gabinetortodontyczny.eu/userfiles/file/legozenasina.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/098f7c87ca4e82a44da8b02ab900fd3c/78800282033.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bbeccbc267e---kekivowixijuf.pdfIn PDF document text
    • http://przychodnia-felinskiego.pl/uploads/editor/file/xivasamesowimupasef.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/k83mbsqg435cmlaj8r52h27j5i/79276324741.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/vkmb05bjgk09rc60pfpmroc5ts/jelupa.pdfIn 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://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_off000b6d7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6D7E 10976 bytes
SHA-256: 724bd5bdaff472885679ef9064be296258d8ab05ec2e2145ffbd57ea1a24e7b8
font_01_sfnt_off000b86fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB86FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000b9f16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9F16 22852 bytes
SHA-256: e6a1562cc900799278994b62eba6ab026357239758bdd6be89be37fd510f6b45

Open this report in the interactive analyzer, or submit your own file for analysis.