Malicious PDF — malware analysis report

Static analysis result for SHA-256 b37c6904996345a4…

MALICIOUS

PDF

103.3 KB Created: 2021-06-27 23:08:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 55428975197c30fe21dafb8086ba9869 SHA-1: ba874b3d07f3e801cc97c36c4a9f18e89f75c133 SHA-256: b37c6904996345a49d155e82b88799bc905c7fc099e48942f06c84a409fc5973
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier, indicating malicious intent. It contains numerous embedded URLs, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of these links and the overall structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9847

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://garglob.ru/uplcv?utm_term=where+can+i+watch+my+hero+academia+movie+heroes+rising PDF link annotation
    • http://antiochhighclassof70.com/clients/4/4a/4a4d67c83f6236388cbe8d22d68d4f91/File/pekobomebukolusewinejitep.pdfIn PDF document text
    • http://e-hematologica.com/users//file/90022032360.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607d92d0bcaf7---nakazulisowa.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/7fffc07c66ec5c5272190586d8de16f9/punakimeture.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160bc5bd21d2fe---93460598489.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609a6f9a0a268---kagibugidupizupe.pdfIn PDF document text
    • https://tappowine.com/file/21154655469.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8ac3f6220c---70318808680.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/aqcl3jk31cigpb7fd8c285q9k4/mokijogovarokolibunikix.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/tm93b1td72m7vaee85h1lv1t7h/70889660435.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/e957b46e67f8e922966e1ba2338f3627/sudesipoxiz.pdfIn PDF document text
    • https://widepolymers.com/userfiles/file/jemeratidejopab.pdfIn PDF document text
    • https://munord.com/wp-content/plugins/super-forms/uploads/php/files/9aa2b22ad5151d055ccde94e92bf308a/zidozorojetisig.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160958c14e2fde---revimesugidonowegobed.pdfIn PDF document text
    • http://polloricowings.com/uploads/files/56351501673.pdfIn PDF document text
    • http://rudolphalexander.com/uploads/files/nakukom.pdfIn PDF document text
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607910b8db095---nasenolimesux.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077cdab7f30c---68903653561.pdfIn PDF document text
    • http://libron.pl/fckupload/assets/file/93888365162.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7a0e32caf---84323943366.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/wilezuneguf.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f86a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF86A 18776 bytes
SHA-256: 82f783a5aae66bb6e0d5de3bb957110ca9bca4d87b76f97728934396560c0c6b
font_01_sfnt_off00012994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12994 16632 bytes
SHA-256: 680e586a1ee573e661d30ea0f7a97a8805d5b79b2e3d5282e6cd27ea8e1e9edb
font_02_sfnt_off000140aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140AA 11028 bytes
SHA-256: 41c1f1c87773e3470c2eb5eed6158f8259268b6104a72f5967503d50c5235013
font_03_sfnt_off00015a0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A0D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off0001721a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1721A 7624 bytes
SHA-256: 31400208cdc69be8f03e3431d757c412a0266d23eceb7464a5020a4cdabd41e5

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