Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2c72eb5cbccf885…

MALICIOUS

PDF

79.6 KB Created: 2021-06-25 18:01:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a55ded74eef2fa1285e88cbe3a59a7a7 SHA-1: 2fa3854e397273a5274327f3141c898c96549967 SHA-256: e2c72eb5cbccf8852dbab0712b79973bc761fca94afc24a11bdaebc0161fddbb
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting. These links likely serve as lures for phishing attacks or to distribute further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1608a879804f37---26614982039.pdf
    • http://bestbuyfromindia.com/userfiles/file/65611193470.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/16094c7c3a48ca---vevumivurulu.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b488695fb9c---doxonajebazikozomuvefude.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160796ee03b39b---telowawusafabipitijalarit.pdf
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/ad47fc52491789d5984032285710c53c/jogosuzagozigasemojedu.pdf
    • http://edu-family72.ru/content/images/uploads/file/12227094974.pdf
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec15f26517---6572558737.pdf
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef50f0709f---52585733458.pdf
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606c813a493fe---genokagobatotebuwu.pdf
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ac6ae9c17fc---xamufekebuju.pdf
    • http://www.abcklima.hu//data/editorfile/61374793271.pdf
    • http://voxel-avocats.fr/uploads/file/xofuziwowa.pdf
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608630420d813---70391342049.pdf
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/bpmob485v4s3ar0o8bekrk4226/pilifugezupat.pdf
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609bfd0799e80---zudefexexalefivuka.pdf
    • https://aedwea.com/upload/foto/nujebatululonotekaneka.pdf
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/64540e70a553304e7de3096b54de491d/pulazotafujuvijijeraja.pdf
    • https://airbays.com/userfiles/file/ximilusikat.pdf
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/d1d7f204964536a3f0a11a3b7ed5cfee/gawoxuxusogerowuf.pdf
    • http://cosmic-kino.ru/sadm_files/34476638813.pdf
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/16073d71c18dc3---98460314101.pdf
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/60022b6ccacc109b0d7c69c94d509f22/79956782146.pdf
    • http://cnc-soustruzeni.cz/files/file/27437914260.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+get+incubator+power+core+in+warframe
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d49f.bin
6cd99ce873938acb8edabdfaf806251f1fd168bf7122e6ef9817a5ea23369425
pdf-font-stream PDF embedded font (sfnt) at offset 0xD49F 16632 bytes
font_01_sfnt_off0000ffa9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA9 16792 bytes
font_02_sfnt_off000117c0.bin
db72d4edc53b1fba5fc42e8f7100abcfb6eba28e722c54db4d619bb1e53f290e
pdf-font-stream PDF embedded font (sfnt) at offset 0x117C0 10928 bytes