Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ecc9e891edc3799…

MALICIOUS

PDF

93.0 KB Created: 2021-08-06 17:43:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4a823938b9e2c54e39442182341fa492 SHA-1: 7b259f139f1e02f4cbf2db46c55b19e6deece161 SHA-256: 7ecc9e891edc379919599d0598e43a1ac3fbc24bb6677129f4a20f0f5d049af5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to obscure the final destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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.
  • 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://doktor-ara.com/userfiles/files/60616401634.pdf In PDF document text
    • http://jaluzipro.ru/public/userfiles/file/48488497989.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba2ee14819---donurewinoxam.pdfIn PDF document text
    • https://maggies-handmade.com/UserFiles/files/lomow.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/9ijbjt4n2i2g6gga6hjiji0482/wisivavasagekawi.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/c9e84a5767c5e16d3dea0624eb253016/wizakujex.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bc72ff321e6---nuvevivuxisewozob.pdfIn PDF document text
    • http://redigonda.it/userfiles/files/99450710361.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d2bc3474b93---pojerixetako.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/rikowebibawasefo.pdfIn PDF document text
    • http://indecomavo.pl/inc/91310618818.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eae134496f---mipemobegovudapeladezokuk.pdfIn PDF document text
    • https://allmassage.net/upload/file/20210722192643.pdfIn PDF document text
    • https://cnn-logistics.com/asset/files/46137602267.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/846ef01363fde50b338435958bdbb3e6/xazuligepolita.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a862e1e5a21---sefibalezonurifaduvutumi.pdfIn PDF document text
    • http://dostavkaturov.ru/files/file/xilode.pdfIn PDF document text
    • http://xn--80aafbanafwvcftiqfecrg2a.xn--p1ai/pict/file/74375562398.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/vaxidomelot.pdfIn PDF document text
    • http://autoklej.pl/app/webroot/media/files/puxoxasefesidopa.pdfIn PDF document text
    • https://zapcdn.space/web/img/podborky/files/77985641992.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210627125833_1240388246.pdfIn PDF document text
    • http://geologicatoscana.eu/userfiles/files/11349664923.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=pharma+marketing+strategies+in+indian+pdfPDF 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_off000109ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109AC 10872 bytes
SHA-256: 15bd1186ab1569f1175b97ef5a6556feed881ed7de95b4385e1ab5e95db6fb6f
font_01_sfnt_off00012266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12266 16476 bytes
SHA-256: 64529f26111c13497c1668ab527c4fd5549e8dea877652d9899ed389760afe90
font_02_sfnt_off00014d58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D58 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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