Malicious PDF — malware analysis report

Static analysis result for SHA-256 080c8f07e1ff8dbd…

MALICIOUS

PDF

95.6 KB Created: 2021-07-03 21:59:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 30d64e6ab4b0dadd1541dcc5cc78eaea SHA-1: 4afaacc55eb6a2c01af20986cf1107c677c53326 SHA-256: 080c8f07e1ff8dbdfb2bb1e87645455214aed94bd12f8dd34df98318e50129a7
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs, while varied, contribute to the overall pattern of directing users to external, potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9486

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 https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/464cc8f44cba0a039a0ac2a6c8840c99/rajojap.pdf In PDF document text
    • http://guitarenko.fr/img/files/radiz.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087da610b496---fuzunapitewize.pdfIn PDF document text
    • http://allmedicus.com/userfiles/file/minugigozujezuxele.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/e832edd4a00d1f3a74ca3d7483653d4c/zepexobafag.pdfIn PDF document text
    • http://drapa-technika.cz/UserFiles/File/zezugenagubewilof.pdfIn PDF document text
    • https://bawaniint.com/ckfinder/userfiles/files/jatagerorejabi.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac34bee2a4f---99073231077.pdfIn PDF document text
    • https://muzeumkonstancina.pl/attachments/file/53110341081.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/44209847086.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7827ad8476---17740036706.pdfIn PDF document text
    • http://bright-inter.com/file_media/file_image/file/13141113150.pdfIn PDF document text
    • http://szentistvanpatika.hu/upload/file/69767320992.pdfIn PDF document text
    • http://isystem.hu/ckfinder/userfiles/files/wakeviz.pdfIn PDF document text
    • https://carlojans.com/cms/file/bopuzikebizelemamugod.pdfIn PDF document text
    • https://heritagecambodiatravel.com/userfiles/file/84689879611.pdfIn PDF document text
    • https://thuanxuongmonmb.com/admin/webroot/upload/image/files/30014621840.pdfIn PDF document text
    • https://teenvolunteerhouston.org/wp-content/plugins/super-forms/uploads/php/files/2845d6513b1f78324640ae5bf50ee88c/36704655110.pdfIn PDF document text
    • https://walterchiropracticclinic.com/home/walter/public_html/ckfinder/userfiles/files/bexunabupasezo.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609252644dee4---59187221003.pdfIn PDF document text
    • http://capital96.com/userfiles/file/gunusisagabijipag.pdfIn PDF document text
    • https://hocngoaingu123.com/upload/files/semizoxopeninigi.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160761bd70a546---33012237038.pdfIn PDF document text
    • http://rorolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/62920658676.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b4937690cfd---75930209984.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/v9augfr03mttb5fgk3j551r1u0/77283328250.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=boot+licker+means+in+englishPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000d973.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xD973 18328 bytes
SHA-256: d9f5e66163d907df9b2c2f031b8906ab183602eda4757f3e8ef428a9cf922d60
font_01_sfnt_off0000f70b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF70B 3464 bytes
SHA-256: a8161c2f5ba9235eb51b4fcc43b6bb219725019365cb8d38f9ec25dfe5ce54ff
font_02_sfnt_off0001048b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1048B 10820 bytes
SHA-256: e67a8f0f2f2eb28b60749434f978491958296fbb0e31e6fb32e1ac30d7813835
font_03_sfnt_off00011d51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D51 23296 bytes
SHA-256: 6ae6144a8e8ea228e503434a68eb124ad8a94152b20389143ce8ad7795babf56
font_04_sfnt_off0001566e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1566E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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