Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a2ec3f75c0d17dd…

MALICIOUS

PDF

74.3 KB Created: 2021-07-13 16:03:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 24776ccabf78ddbc2a11defdb8655ca5 SHA-1: ab92605fc894787a9cd5fec6741aa2434b5ac662 SHA-256: 5a2ec3f75c0d17dd2ff303905eddc346de9ee0e0d7b0ea84f5eb209bd64b99c4
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It functions as a link farm, with numerous embedded URLs pointing to compromised websites that likely host further malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a tactic to distribute malicious links across various domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abae6a6179a---ritejefedujo.pdf In PDF document text
    • http://akinmedikal.com/uploads/file/79179175398.pdfIn PDF document text
    • http://closehorses.com/userfiles/file/fafesewev.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ebfd5df7aa0f8cea880857724705c003/85962088950.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a226f120a6f---guzegi.pdfIn PDF document text
    • http://pgnsualumni.com/clients/872691/File/worowekenavaso.pdfIn PDF document text
    • http://perfekttorun.pl/pliki/81799440418.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/8b8bd979963401e456a07451fa7271d8/69571768255.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ec539d04856---linozul.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/233ab94fbbd58ff5078747a03bb64fd3/53400291194.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/b8kkcciddovrigdvna3fn3bsn3/manuzo.pdfIn PDF document text
    • http://siembra.me/uploads/files/vutofijosin.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/c0v1s213ejnq17am2a1f1bhj94/33786966693.pdfIn PDF document text
    • http://olympiad-bigben.ru/ckfinder/userfiles/files/seberuzevilamokanikoziz.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16074c1b66d13e---nimirarezobox.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/6tspi7sdmeb84ksi7d693mdpmu/kovoberugarutiwezexekajo.pdfIn PDF document text
    • http://baodieptailor.com/uploads/2021-06-18/images/files/teridavanolagusagaduwu.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609435f72c17e---diwudalixepegubiwanukuwid.pdfIn PDF document text
    • https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/qu1eo621c4c7mkbuheavfpd9hi/83006174941.pdfIn PDF document text
    • http://altinay-law.com/images/file/74605103937.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/ae1b9ed8da4b7ed7f53c74190be08715/21894173242.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/0211af452d19c8bd6d223430100b8928/fikobonunusidotuji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=star+trek+fleet+command+business+as+usual+missionPDF link annotation
    • 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_off0000bf79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF79 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d78b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD78B 16480 bytes
SHA-256: 7fb48511e897bdfd0e3f1cbcfb42ec53ffbfd71f5170345a3c1afe084d641d7f
font_02_sfnt_off0001021b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1021B 11044 bytes
SHA-256: 11429f4988f866e77c19c409239db181542a1c2b9b92aa671e117e7a2c2ecd0d

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