Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce00b1b5a77b7270…

MALICIOUS

PDF

85.8 KB Created: 2021-09-06 19:29:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 164abe5be9b785d23afdc1399e67e4e0 SHA-1: e9b6c63cb1989a0898517e40773ea42d7e9515a3 SHA-256: ce00b1b5a77b727068a4c1d8be7d5307d471aed3235ed44ce5420c79c5546c1c
196 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of threat. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document's purpose is to trick the user into decrypting a password-protected archive, which likely contains a secondary payload. Numerous URLs pointing to compromised WordPress installations and disposable hosting were extracted, suggesting a distribution mechanism for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160e4b54772a46---bikuwijemolo.pdf In PDF document text
    • http://aven.su/userfiles/file/volovorolin.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/s6psps2ifin06jj6977g2oav7d/76985660636.pdfIn PDF document text
    • http://hotechike.com/files/files/logoxutusowegofib.pdfIn PDF document text
    • http://sb-78.ru/files/file/20661572773.pdfIn PDF document text
    • http://architettotamborra.eu/userfiles/files/70814900889.pdfIn PDF document text
    • http://sieuthicayxanh.vn/webroot/img/files/58761323213.pdfIn PDF document text
    • http://www.buildonhope.org/file/76825360169.pdfIn PDF document text
    • http://ruihuitax.com/files/file/1991388402.pdfIn PDF document text
    • http://cokhihoangvinh.com/uploads/userfiles/file/32799126971.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b826aec24fa---kawenakisalezezepavif.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607692460c139---91307716436.pdfIn PDF document text
    • http://thegioichuyendong.info/app/webroot/upload/files/43818422434.pdfIn PDF document text
    • http://pphjako.pl/userfiles/file/rofina.pdfIn PDF document text
    • https://braintreeclinics.com/app/webroot/img/files/didem.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/16072b6d5986cd---vujoxokupeva.pdfIn PDF document text
    • https://raiporjai.com/piceditor/file/xurogudojeke.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/ilvemh7o1d06p2ufftd9ke06s1/89277778556.pdfIn PDF document text
    • https://xuantruongtech.com/images/ckeditor/files/83149458658.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e3ccc528257---tagimusitugopagesupe.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/541b10mdd6nv3oki2na6640cc2/fuvipejumapevexijamimugub.pdfIn PDF document text
    • http://blueyee.com/upload/file/111423187155.pdfIn PDF document text
    • http://kbchina.de/upload/jureku.pdfIn PDF document text
    • http://jualumnitoronto.com/editor/uploadfiles/boditogopelakazosob.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/5lg01btc8ckibmm8up7vv3k5i3/88770903958.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=new+york+times+articles+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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d21d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD21D 17724 bytes
SHA-256: 195e757afa40513f0621e6f29f344498a326ec03e7aca388677d6d8bcbd1ff1c
font_01_sfnt_off00010055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10055 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001186c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1186C 10944 bytes
SHA-256: 1ff8b76fa0f5d27a60f5e0fe09a2076960d4a206efd177f66d140d260629830f
font_03_sfnt_off000131f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131F1 16448 bytes
SHA-256: 0e4cde3d5bdd5452960de995a4807c8da4ec665155a9812e2f8e54e6c49b7878

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