Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0ee4db77194bcfb…

MALICIOUS

PDF

91.1 KB Created: 2021-09-17 00:51:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d4429e1be1332ee4c3698a2760e77e7c SHA-1: 9420dfdef88ef0ec8e8d4669fb3a1a19c7e94105 SHA-256: b0ee4db77194bcfbaecff795da6260c6c9f785ed017a2178ab6b8732e5407128
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to host malicious content or redirect to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://laborke.ru/uplcv?utm_term=dragon+ball+awakening+android PDF link annotation
    • http://bavlas.lt/ckfinder/userfiles/files/98778514698.pdfIn PDF document text
    • https://whitesal.com/data/images/file/3956_20210902035817.pdfIn PDF document text
    • http://cancercareresearch.com/userfiles/file/dobakabowafateme.pdfIn PDF document text
    • https://thediamangroup.com/_images/files/zasedemezisakomij.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/d4cd7674a57b7bd313878ba0fd343598/63245385206.pdfIn PDF document text
    • http://clear-es.net/yamituki-n/uploads/files/sogelofefomonep.pdfIn PDF document text
    • http://lucidarepavimentimarmogenovaealessandria.it/userfiles/files/86006360430.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/01a75d1e4850697bb455251e18cef1a0/62889390234.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cb81e869fa---xozavejigumezo.pdfIn PDF document text
    • http://adbuilder.at/ckfinder/userfiles/files/60073140423.pdfIn PDF document text
    • http://12shio5.com/contents/files/sexuri.pdfIn PDF document text
    • http://westernstudioservice.com/admin/userfiles/file/worolibusupomejuboramize.pdfIn PDF document text
    • http://bassonconsulting.mc/userfiles/file/noxidepojujupimezenu.pdfIn PDF document text
    • http://tunapvietnam.thietbiotoviet.com/Images_upload/files/vugegeparezo.pdfIn PDF document text
    • http://seoulgreeter.com/userData/board/file/80771549067.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/69738787941.pdfIn PDF document text
    • http://edukoc.net/userData/ebizro_board/file/71251204721.pdfIn PDF document text
    • http://dlastudenta.org/Upload/file/15009448931.pdfIn PDF document text
    • http://rajasthanmetals.com/userfiles/file/puzik.pdfIn PDF document text
    • https://diarch.in/WYSIWYGImage/file/famizuku.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/sijaba.pdfIn PDF document text
    • http://unicaconsultoriarh.com/images/files/38684424110.pdfIn PDF document text
    • https://mma-montessori.com/admin/ckfinder/userfiles/files/27125618213.pdfIn PDF document text
    • https://polenhosting.com/calisma2/files/uploads/gapizapu.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD831 24456 bytes
SHA-256: 4e8c87fd07661c596282dc39a81980892d03192a680a957c52ce8678bfdfdb1f
font_01_sfnt_off000117d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117D9 10476 bytes
SHA-256: 5f3fb4cfad34203f862b01edfddac8865f04137832105df634608a77cc02345e
font_02_sfnt_off00012f85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F85 16336 bytes
SHA-256: 4aa4ea582699fedbbdadc063f43bd1b4cbedb877506fb1ae283ad7d0e4518604
font_03_sfnt_off000145de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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