Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e509bc2ce8b5a8e…

MALICIOUS

PDF

81.1 KB Created: 2021-09-13 00:42:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5ba7e65d29dfa2cde87eacfeb0bfe281 SHA-1: 9ed66dd682160d4b9fca69303ac9a78b919c1c79 SHA-256: 1e509bc2ce8b5a8ea5359d0e3cb2ab26f99d3139d124ce78043a0c9795223139
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised websites or disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the structure and URL patterns are consistent with malware distribution or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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 http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/tasumaxalelibuka.pdf In PDF document text
    • https://www.dooleysnaturalgas.com/ckfinder/userfiles/files/91012692831.pdfIn PDF document text
    • http://alacarte-grafik.de/userfiles/file/13795006610.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613786c5d1a25---94244079248.pdfIn PDF document text
    • http://hzxgdz.com/images/upload/File/koboxovet.pdfIn PDF document text
    • http://e-district.org/userfiles/file/vagositajejunufolawobine.pdfIn PDF document text
    • http://herve-coiffure.ci/files/letepojamudifa.pdfIn PDF document text
    • https://sharmtocairo.com/userfiles/files/70022407536.pdfIn PDF document text
    • https://invision.buzyhub.com/files/82338502449.pdfIn PDF document text
    • https://swagath.co/new/ckfinder/userfiles/files/23211389847.pdfIn PDF document text
    • http://rentator.com/uploades/fckeditorfile/5424795939.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139c2869266a---63816161329.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/16135440f87646---87897650422.pdfIn PDF document text
    • https://bunyaminerdemir.com/resimler/files/15297379565.pdfIn PDF document text
    • http://osstemcardiotec.com/files/fckeditor/file/649354345613e6f19c504e.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/161344ec29e970---fikujifejato.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/4e7af96c5fcc4183debb7752c63c2c5b/67377670410.pdfIn PDF document text
    • https://amadesafar.ir/basefile/amadesafarir/files/kafojubigawizemavi.pdfIn PDF document text
    • http://kyanite.tv/userfiles/file/mesanunatasazobirawavif.pdfIn PDF document text
    • https://hirurgija.me/files/20390313626.pdfIn PDF document text
    • http://kleinschaden-expert.de/userfiles/file/gekilexatanagas.pdfIn PDF document text
    • http://aasghsflqsae.handylover.com/upload/files/vefiwomabiwuvidakasek.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613559cccf84f---medopiguxigazigapijeva.pdfIn PDF document text
    • https://airshow-bg.com/file/wesumapoxowexeseto.pdfIn PDF document text
    • https://ikitellirezistans.com/upload/files/99981167129.pdfIn PDF document text
    • http://alrabbanoilandgas.com/file/files/15288658062.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=toca+hair+salon+apkPDF 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_off0000d9bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9BC 10296 bytes
SHA-256: fe5807a18328191cb5d693b154264356c6e8312c8865842d42d1c1bd083a2596
font_01_sfnt_off0000f0d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000108e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E4 17880 bytes
SHA-256: 45a48a7001069eda3b79636002685a4b0d177d8aa7ac3b1112ef32dafb0f3871

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