Malicious PDF — malware analysis report

Static analysis result for SHA-256 710cad7cfafc615d…

MALICIOUS

PDF

77.6 KB Created: 2021-09-16 08:52:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 98d2213bedcd6276b7b30d27267cfdca SHA-1: 6cfb51fb9e7d634943188cf98dd526bd9062a9f4 SHA-256: 710cad7cfafc615d53c37720ce2ca818f52f898945dfe63ddb2fe8c60cae8b75
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or trojan threat. It functions as a link farm, directing users to multiple potentially compromised websites, including those hosted on WordPress uploads and disposable domains. The presence of embedded URLs and the nature of the heuristics suggest an attempt to redirect users to malicious content, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5236

Heuristics 5

  • 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
  • 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://nomylo.ru/uplcv?utm_term=chandni+chowk+to+china+full+movie+download+720p+worldfree4u PDF link annotation
    • http://master-stroi76.ru/userfiles/file/70766728767.pdfIn PDF document text
    • http://vmkmsz.hu/userfiles/file/33060680962.pdfIn PDF document text
    • https://cplastik.com/data/cms/file/wofewevomiputetiwek.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/18f8db095fb75b9b2df3f92d73e80cdc/63834500334.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612f09869d211---lanojejo.pdfIn PDF document text
    • http://thumpamonpally.com/userfiles/file/90430174601.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141ee215fd69---47938759597.pdfIn PDF document text
    • http://skpizzasubs.com/uploads/files/61137478296.pdfIn PDF document text
    • https://grupo-kayros.com/userfiles/file/77229267502.pdfIn PDF document text
    • http://sdtrafficticketlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/72372044705.pdfIn PDF document text
    • http://studiobaldizzone.com/userfiles/files/68934017292.pdfIn PDF document text
    • http://tecnoservizi.com/userfiles/files/99142885525.pdfIn PDF document text
    • https://www.tratedu.net/ssss2018/assets/143ad273/ckfinder/core/connector/php/upload/userfiles/files/f90a81818758762fb8a58c7dcc3937cf.pdfIn PDF document text
    • http://archi-m.ru/userfiles/file/43384603342.pdfIn PDF document text
    • https://stmpallet.com/ckfinder/userfiles/files/55118939166.pdfIn PDF document text
    • http://xn--80aaa1acmiejxr6d7fg.xn--p1ai/data/files/31253052098.pdfIn PDF document text
    • http://ancient-theater.gr/media/file/vevab.pdfIn PDF document text
    • https://www.edm-medical.net/ckfinder/userfiles/files/42665741953.pdfIn PDF document text
    • http://pbpharm.com/upload/files/jabolowisowu.pdfIn PDF document text
    • http://biomax.shop/filespath/files/20210901212048.pdfIn PDF document text
    • https://piauiaqui.com/ckfinder/files/13758057530.pdfIn PDF document text
    • http://xhzhengli.com/upload/79343264108.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/18444384189.pdfIn 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_off0000d3ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3EF 19628 bytes
SHA-256: 7e43aa928384eae30cff55ad2ff7de01c2dff05b06897a774cef3d789060b297
font_01_sfnt_off000107c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011fdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FDF 11460 bytes
SHA-256: f035b5fc094d43365d47df9977af5f6a46d3720b3f3b36daae3cd13cb10833ff

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