Malicious PDF — malware analysis report

Static analysis result for SHA-256 00d822e3fdc77182…

MALICIOUS

PDF

87.9 KB Created: 2021-09-04 05:22:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 5204ecdcc4f6e4ecae96262ced5c18b2 SHA-1: 0f68ff015cbd7108ceb1450a54d84d1d06902627 SHA-256: 00d822e3fdc77182ad7756761ea14a9805d218bbcbe006be370166bfcdb7b33f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous websites, many hosted on compromised CMS uploads, suggesting an attempt to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware delivery mechanism, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://drafthe.ru/uplcv?utm_term=handwriting+upper+and+lowercase+letters+worksheets PDF link annotation
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/0a8931a1f3d9e08d129c78f94e453087/tusamurazonitel.pdfIn PDF document text
    • https://psg66.ru/admin/ckfinder/userfiles/files/70882290040.pdfIn PDF document text
    • https://igruppe.no/ckfinder/userfiles//files/nitalofariliwilad.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dfbdc1609f---51159816460.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cafac3facb---99210393595.pdfIn PDF document text
    • http://www.minaakshimajumdar.com/fckimages/file/75332556695.pdfIn PDF document text
    • http://nousgarage.com/userfiles/file/pupedofavisazepu.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f0a48125cdc---40778065061.pdfIn PDF document text
    • https://egf.tw/test2/images/file/38259832312.pdfIn PDF document text
    • http://judge1960reunion.com/clients/873273/File/51026381875.pdfIn PDF document text
    • http://londonjip.com/userData/board/file/dagowezavurit.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff440ebe6f---46525666631.pdfIn PDF document text
    • https://aymexco.eu/ckfinder/userfiles/files/81127352343.pdfIn PDF document text
    • http://jvcc.cn/ckfinder/userfiles/files/210630200506289771mlbxg.pdfIn PDF document text
    • http://rentbucharest.net/images/userfiles/jugenuzadesisofuse.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16089592235102---89403714940.pdfIn PDF document text
    • http://autoscuolavalerio.it/userfiles/files/jakob.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/1a5afe51cf794c282b086b410e82a848/28759169453.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/zuzan.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acbfa1ca278---jatavaxidaxo.pdfIn PDF document text
    • http://www.klimavill.com//data/editorfile/wakakegasuxexa.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608116c9ed1fb---bijogurabavifoserok.pdfIn PDF document text
    • http://hysansam.com/fckeditor/userfiles/image/xorigigonuvuputon.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_off0000f07f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF07F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10896 11064 bytes
SHA-256: fa5f470399197d53a0ff7252ff6af13755fb4b95552c156e714a3a826de20c67
font_02_sfnt_off0001220e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1220E 18652 bytes
SHA-256: f5190c59f2dcbbd6f5997351c6c30b0292505ca511bf3198dffbfbb8dddbb8de

Open this report in the interactive analyzer, or submit your own file for analysis.