Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfa99bc09fe05401…

MALICIOUS

PDF

110.9 KB Created: 2021-08-13 04:53:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 654c63aa52aa05374654d5cb18b1cf80 SHA-1: 1657867e066228db400ba6e55bd20d13b1d2a1f8 SHA-256: bfa99bc09fe05401e5ac87adbf0e642763d37e08005880fe23f96edd3e599653
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan. It contains a link farm pointing to numerous compromised WordPress upload directories and other disposable hosting sites. These links are likely intended to redirect users to malicious content, such as phishing pages or malware download sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2649

Heuristics 5

  • 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
  • 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://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/6602655c1b8ec5be0f4098490e0d9270/sajujipunifewirogisa.pdf In PDF document text
    • http://alexhofford.com/temp/files/file/10927560824.pdfIn PDF document text
    • https://cornerstonelaw.eu/userfiles//file/35913456514.pdfIn PDF document text
    • http://jmestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/belofodiwul.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a385f69295---82973019942.pdfIn PDF document text
    • http://cuspsurgeons.com/userfiles/file/62598600414.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/08b79fa1224cd3656c3ab692aaa8980c/pizumidonadirujuzenu.pdfIn PDF document text
    • http://davisfolk.net/clients/1/1f/1f1070e31f35868a9a13f38ee7dc887f/File/32425256883.pdfIn PDF document text
    • http://nuk-amro.de/userfiles/file/vevototifejosabeled.pdfIn PDF document text
    • https://salvamontbihor.ro/app/webroot/files/userfiles/files/54363779036.pdfIn PDF document text
    • https://bodzlomu.com/userfiles/file/titipuwisepozigig.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093a083a3f9d---27696722747.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105e081d7aa1---xamojeribomo.pdfIn PDF document text
    • http://scarpatti.com/files/72616057197.pdfIn PDF document text
    • https://getadoc.in/ckfinder/userfiles/files/71230144408.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/2c78ecaffef07756f8ed5e93201be319/4408834793.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/hgm8qa0r2gchf4i4q3ugl3th4v/89107794431.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/32e9b614bfd479f59fb30633ac83b3af/borikufasikenuxofipow.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/rkbh9tdoh8bf537s8ic98q5n61/64449996465.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa951263b3---roxivalotowowusizonu.pdfIn PDF document text
    • http://vmkmsz.hu/userfiles/file/kevadozujigiwibexiredew.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/8605eaecafda54e1b6fc81d76e801fc5/45134345822.pdfIn PDF document text
    • http://aaronandanthony.com/userfiles/files/jekorigivipamefamud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=cambridge+igcse+biology+coursebook+third+edition+answersPDF link annotation
    • 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_off0001610c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1610C 17032 bytes
SHA-256: 035bbeb43c288314c639c8c5fe5e29b7d5b380b5998316eb631b755ccd19ad16
font_01_sfnt_off00018c65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18C65 11380 bytes
SHA-256: 414dc41f5c3e2879d0f66927a340f748a55b481046c9ea42b2cd0af4bb5d00dc
font_02_sfnt_off0001a6e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A6E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1