Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b0e230bd8b0a2c3…

MALICIOUS

PDF

72.1 KB Created: 2021-10-07 17:46:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 96c2e27862b7be9c6052978a174dcb1f SHA-1: 0493e6b4387b7d1d5ff9c8b84c87d9ce73ce23c1 SHA-256: 0b0e230bd8b0a2c3b28214912a33f02e19753109ed7d7e3c0ce81a821bc00ecd
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely involving the exploitation of PDF vulnerabilities to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://queure.ru/uplcv?utm_term=if+a+man+answers+full+movie+online+free PDF link annotation
    • http://yurisolomko.com/userfiles/file/pomutafufugamavexejagogad.pdfIn PDF document text
    • https://akonis.ch/userfiles/files/podelokevurigisubifirisi.pdfIn PDF document text
    • http://kantoromega.pl/userfiles/file/lowumowedaxulikonakapov.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/tmp/31582606272.pdfIn PDF document text
    • http://hungbuloon.com/media/ftp/file/98402167513.pdfIn PDF document text
    • http://bowlingkillers.com/imgdb/files/20761920505.pdfIn PDF document text
    • https://baoyi-chuck.com/ckfinder/userfiles/files/88347202175.pdfIn PDF document text
    • https://nstoplana.rs/ckfinder/userfiles/files/ludolejulizekumoj.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/12e1f3fc1922101882f5f100b9ee6e4a/xevosobujadito.pdfIn PDF document text
    • http://americasbestwingspa.iorderfoods.com/uploads/files/gajabujikawukotosepiz.pdfIn PDF document text
    • https://sunnyrosesschool.com/userfiles/file/52487471479.pdfIn PDF document text
    • https://rh-h1tapi-turbo.com/contents/files/69604439030.pdfIn PDF document text
    • http://artdealer.vn/upload/fckimagesfile/f3c581837e133ccf85ef49aef5c9d346.pdfIn PDF document text
    • https://cottingham-group.com/cufiles/files/lalijivawuvurewib.pdfIn PDF document text
    • https://interangkorcondominium.com/userfiles/file/58780173912.pdfIn PDF document text
    • http://pvvc.cz/files/81861639212.pdfIn PDF document text
    • http://phannhan.vn/files/usersfiles/files/gufitonupete.pdfIn PDF document text
    • https://abhimaninteriors.com/ckfinder/userfiles/files/sadupijunixafofer.pdfIn PDF document text
    • https://sinarlangit1.com/contents/files/66640256567.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16158c1c97d683---35869181694.pdfIn PDF document text
    • https://westhigienia.hu/editor_up/wegomebuworojizetanapige.pdfIn PDF document text
    • http://dakhoanhanai.com/images/files/zivaxajudo.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/b31a44a2be166b96d14028584ea52fd3/mabojasikewol.pdfIn PDF document text
    • 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_off0000b75c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB75C 10480 bytes
SHA-256: b7aa41436445524d2ce3c79c36a29bb51c80cc0aab88e2a84b21bcd20fcda176
font_01_sfnt_off0000cf26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF26 16884 bytes
SHA-256: f372b2695418b7a8d1cf6e8936b07ae817587995994668cd8b96bd54ab2463a8
font_02_sfnt_off0000faf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1