Malicious PDF — malware analysis report

Static analysis result for SHA-256 114b47a551462e9e…

MALICIOUS

PDF

96.2 KB Created: 2021-09-05 08:03:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 79080e25227a5eaad42e23c48c8757ce SHA-1: 7ad11cd28ea61b48800bb823103638c5ab5ac173 SHA-256: 114b47a551462e9e8fdb81c43d54c1aa243b199ebc99af83be57544ee09ad551
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm used to redirect users to malicious content. The presence of external URIs and compromised CMS upload links points towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9806

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://wastran.ru/uplcv?utm_term=extraction+of+chlorophyll+pdf PDF link annotation
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160771dcba3996---biverobe.pdfIn PDF document text
    • http://startmatbaa.com/userfiles/file/34546682194.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/27d868c8da35dcced9c39edca7a488b5/fexeja.pdfIn PDF document text
    • http://jatyn.cn/upfiles/202107/file/1625353509.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b8a3bf382---bexivonipowuwonidojetoz.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/c98307c2bd2017b8efac90b6927790a0/zanamejepuzizosu.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/7275492272ae65ea24221065d34688b1/sinatizatireminapurenasew.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ac294b8d3ed---badepexopa.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0c7eacd42---wuxupu.pdfIn PDF document text
    • http://gwardiajuvenia.pl/zdjecia/fck/file/tirufafuvi.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/zixal.pdfIn PDF document text
    • http://yao-cheng.com/uploadfiles/20210704023242.pdfIn PDF document text
    • https://bandai-k.com/userfiles/file/lamadibekebatepivunemexaz.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/a6n3u3ktjv5okecp97t3bc06tb/motelilogizawemunovake.pdfIn PDF document text
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/9974963650.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c82de46fb4---64837296076.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/35751564957.pdfIn PDF document text
    • https://nileagriculturalindustries.com/file/43519854467.pdfIn PDF document text
    • http://guitarenko.fr/img/files/zagase.pdfIn PDF document text
    • http://urdu-hadith.com/survey/userfiles/files/15827228311.pdfIn PDF document text
    • http://debden.org/userfiles/file/rekedodejixelugupem.pdfIn PDF document text
    • http://karpatskiles.ru/store/file/37894199816.pdfIn PDF document text
    • http://zimaletto.com/uploads/file/bufajen.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae86c99e42e---60049184150.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9e9250333---sisuxipanobimose.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adbae23e0ce---94916723059.pdfIn PDF document text
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/4f53fb04ea1cd99845992b464cf65c63/gored.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_off00010e81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E81 19956 bytes
SHA-256: a6ea7f29f6dcc85272990fcafb12bf035605c53f39ab3fcb6adbb9503940d413
font_01_sfnt_off000142ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015b01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B01 10616 bytes
SHA-256: 6facacfa8b15869e5d4fc08ad5b3bbe6a96a98d059e4857f94d572213ecce195