Malicious PDF — malware analysis report

Static analysis result for SHA-256 00af0ec6c6c1a695…

MALICIOUS

PDF

87.6 KB Created: 2021-09-04 07:22:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b801ee5134fd8af08cd2621f990658fa SHA-1: bdeeb4e1c3a108b2c2777c2ef6bbd21143e52f95 SHA-256: 00af0ec6c6c1a6958e098e9b5d7bba65ff3dbd8ec2bd5e85303e832148c95079
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of numerous URLs suggests an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://medvor.ru/uplcv?utm_term=sonos+sub+manual PDF link annotation
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/c0fcd6ee1446cd49154781b992d7feb0/7837117233.pdfIn PDF document text
    • http://urduhadith.org/survey/userfiles/files/64499887859.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/2de33571a9ffe71fa8b44164fc91781f/99344305371.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dbe561473e---96784616922.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/aq9m1r6adc11n5bjokdrpmk0c2/diber.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/e6tivgkjjudhufu5epvvkkk13b/jabumizerotuniza.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/20056085457.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/pj8a1g6qkdaq431dfoalt82f15/wisokuwejetasazaboriz.pdfIn PDF document text
    • http://majortaylorride.info/images/uploaded/file/64732117476.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/9ba2c0094651833e49b73c93ac11f30e/73105423491.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/c3c2c7acbc81e5f9a85a38238de89617/98991117251.pdfIn PDF document text
    • http://meyergarden.com/ckfinder/userfiles/files/xolatazalojewolegamun.pdfIn PDF document text
    • http://ksiclub.org/projects/achievemore/admin/upload/fckImages/file/58965635390.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/jekidazugosul.pdfIn PDF document text
    • https://calprin.com/ckfinder/userfiles/files/36561576716.pdfIn PDF document text
    • http://tao-ssct.org/data/upload/file/relagogag.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607943f9c7584---saxepelamoraw.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/90545440892.pdfIn PDF document text
    • https://rockyshairsalon.com/wp-content/plugins/super-forms/uploads/php/files/n3nhp95756aac4n3uliljg8jh0/kuzila.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec9e1f2c36b---rutilelorugofe.pdfIn PDF document text
    • https://stalbeckers.nl/userfiles/image/file/65450774505.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088cd9b314c8---58163023073.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/gerokonovesugedatuvelilux.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088f62a8356d---sisugesu.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_off0000f369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF369 10160 bytes
SHA-256: 9afc1b14fde62375b3865d289cbb1ca8cfd7db559f723a82ed31851ce78ccc57
font_01_sfnt_off00010a13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A13 18064 bytes
SHA-256: abd3709b1803fee352b31a83596f346a74a1c0ce11426832fac5a71e5ecc6782
font_02_sfnt_off000138bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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