Malicious PDF — malware analysis report

Static analysis result for SHA-256 275ee0762198e10d…

MALICIOUS

PDF

84.7 KB Created: 2021-09-05 03:05:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1ec2e1242210373018ffd82c2f58600f SHA-1: bbe8516744f9cfd4dc30a0b7417083b504811c1c SHA-256: 275ee0762198e10df9407688d4a06d2d1a9bc83dd3cada138ca77c66b55b0adf
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. The presence of multiple external URI heuristics further supports the link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://adice-area.com/pictures/files/radip.pdf In PDF document text
    • http://kssi.ir/public/userfiles/file/85923494225.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/jekusegotate.pdfIn PDF document text
    • http://www.boldino-hotel.com/ckfinder/userfiles/files/noruvezepimakipuginop.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160f5fcd3227b1---winidadirakabezij.pdfIn PDF document text
    • https://memoservicesrl.it/file/bomupedepekatupevoxe.pdfIn PDF document text
    • https://rossbeede.com/userfiles/file/23816466909.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075ae5fa0a40---52392796786.pdfIn PDF document text
    • http://movietek.vn/hinh-anh/files/vilukenugot.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/11cb3fdcbac52012f6054cdd10214698/8418092225.pdfIn PDF document text
    • http://franciscakeryandcatering.com/clients/61981/File/17590390212.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3dd72039d---35280473567.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16083b59ed90f7---14561183954.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/67254592064.pdfIn PDF document text
    • http://cestovni-postylka.eu/userfiles/file/mowanubefenotum.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/9cq5t9ke1hdamur7jrho4hg3vk/73444847713.pdfIn PDF document text
    • http://xn----9sbkvfu2aex3d.xn--p1ai/ckfinder/userfiles/files/jukosusekugajiteseramadaz.pdfIn PDF document text
    • http://fsf-vastroad.com/userfiles/file/41773924480.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/a3cac53f99435c305c1966b3bbeb1813/sibetakig.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16105c5088b603---90299733625.pdfIn PDF document text
    • https://bhalakusari.com/uploaded/ckeditors/files/nolaxuretobukut.pdfIn PDF document text
    • https://kham.vn/userfiles/file/noperevinomifikisejow.pdfIn PDF document text
    • http://gintaras.cz/userfiles/file/11007849313.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/a89652f8aa97e5c794bd1e4a150f5015/44238859599.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160e4a4fa37a88---xufarodepeb.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a63ac4eef5---8353044604.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/4de3390a6c23bc81d7e534fb24aef52e/zivapevatudigodazuxefovid.pdfIn PDF document text
    • http://xn--80ahcjevtqq.xn--p1ai/ckfinder/userfiles/files/86438696564.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=anxiety+disorder+dsm+5+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_off0000e602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE602 17604 bytes
SHA-256: 0b22376a646b6a01df916a90286c272978796e98a6abc852bc92c4bc6fc3201c
font_01_sfnt_off000113f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F7 10780 bytes
SHA-256: 34d25ad275c11c11e51b53ae45ba1a280856e151e82503a5c774d3b2a8ce49f5
font_02_sfnt_off00012ce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1