Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2701d398b723249…

MALICIOUS

PDF

109.5 KB Created: 2021-07-29 12:31:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a801b82cd265bbfc1700d7679ecb9259 SHA-1: fc3447f0807b113c59591289a83b92c892ad95d9 SHA-256: c2701d398b72324953e8590c36f2b33528f767ed35f780095f8800509dae78ab
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of 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 distribution. No scripts were extracted, but the structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4b733923f---57637618154.pdf In PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/e5221aa373599c91578d8c4070a2891e/buwugirikakazululo.pdfIn PDF document text
    • http://5lovestartw.com/CKEdit/upload/files/47004828602.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/bbf48b7fd9ee8e94945b5304f06667a5/80695192528.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b854cd1c3d6---66585820209.pdfIn PDF document text
    • http://ctkupavna.ru/upload/file/8124258626.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/5da6bec09e08352550829c75b7d6f4c1/84924333154.pdfIn PDF document text
    • http://kleinschaden.expert/userfiles/file/gojifavovowunuvesefever.pdfIn PDF document text
    • http://izumrud38.com/ckfinder/userfiles/files/fonavenulizil.pdfIn PDF document text
    • http://locthanhroyal.com/upload/files/dakopibuf.pdfIn PDF document text
    • http://greenberetrotcmedals.org/clients/e/ee/eef2f5edcbf7b69ea683240098563b39/File/kepepipulujegemezaxumed.pdfIn PDF document text
    • http://hopkinshigh1988.com/clients/75739/File/bamafalubago.pdfIn PDF document text
    • http://meandnetworking.com/ckfinder/userfiles/files/26483358247.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/tsikaplb3evjoudr2b3msl69p6/7684856307.pdfIn PDF document text
    • http://www.climatisur.com/ckfinder/userfiles/files/simarim.pdfIn PDF document text
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210701050333.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16070c4da1b9ce---23743690905.pdfIn PDF document text
    • http://centreforeffectivecoaching.com/media/file/68273252199.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc55a635a9---wusave.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160aa85d2e055f---76841528670.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/pofibaxiwalezawuwozudaf.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/67380780440.pdfIn PDF document text
    • http://zge-led.com/luodan/images/userfiles/file/vowekobusukikelujepidobow.pdfIn PDF document text
    • http://unsersohn.ch/images/file/devumupitopokerovex.pdfIn PDF document text
    • http://meadescafe.com/userfiles/file/datoligusoworabuwop.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=turnitin+plagiarism+checker+pricePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14793 10856 bytes
SHA-256: 0beb8937deda38680c4c869bb2419d81d43b62ba3e7d41d3c9b874d0f210d654
font_01_sfnt_off00016077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16077 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00017889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17889 17876 bytes
SHA-256: a1128ccb3d1090e00203c798f2e18392d7e91c3b496f4b2a08f0afec0e856403

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