Malicious PDF — malware analysis report

Static analysis result for SHA-256 210584fd901d8017…

MALICIOUS

PDF

132.3 KB Created: 2021-07-14 07:02:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 86de92b6fc02c71727c77b69bfc98cbb SHA-1: 27e6748e7414fa0cef236c04c9045074484c923e SHA-256: 210584fd901d8017200e44bdfbc849d16d26f9e064e715f44a1e16652c720d50
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a phishing or link-farming operation. The embedded URLs, such as 'https://wastran.ru/uplcv?utm_term=managerial+economics+5th+edition+pdf', are likely intended to redirect users to malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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=managerial+economics+5th+edition+pdf PDF link annotation
    • http://whitepurdeespires.com/clients/b/ba/ba703c466af5784ee38134b9d09df413/File/93194122780.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/7b3e831e70f46fa623c097932f6acf5d/jitidekorubideginime.pdfIn PDF document text
    • http://abnicum.com/files/file/dexijinowusudenoroxeb.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/732821a6e31a910627cd3977e7baca3e/kidoxotupasi.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/97abe08020cd472acb7a8717de1b5a74/54607560563.pdfIn PDF document text
    • http://fogathajtohirek.hu/fckfiles/file/zajavaxinu.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c015fae6659---24458766904.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609ba150c1166---gepasobowetebafiso.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160b712c549120---33114016196.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16072730753f18---35649477099.pdfIn PDF document text
    • http://laihoawedding.com/app/webroot/upload/files/88361435518.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/8c89317bf1dea40cf7ee85f2d0c33e4f/32762739972.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/9d75f34279dc8bfa1313a5238741572d/sexogutesaz.pdfIn PDF document text
    • http://ff-engineering.com/userfiles/files/58841496512.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/742bbe488ff81a8c1fdeb40b40de55a4/33942541592.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b41547b7cd7---61981868448.pdfIn PDF document text
    • http://cuboni.com/uploadfile/hong202106200945597352.pdfIn PDF document text
    • http://kstarsmall.net/userfiles/file///18860813840.pdfIn PDF document text
    • http://abwlanham.com/uploads/files/kojebawoludisafit.pdfIn PDF document text
    • https://www.temsilcifirsatlari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080e8fe63a19---sijukiwobol.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/lqs90ruf43o08a98a1t6b3mfah/metotafik.pdfIn PDF document text
    • http://treeoflifetolfu.com/clients/0/07/07f122ebb3396bb3f917f2e62af81596/File/86580974147.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/58716611155.pdfIn PDF document text
    • http://candemdientu.com/Images_upload/files/43747491703.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_off0001a0dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A0DC 18360 bytes
SHA-256: 95a17f39a2b933c94d55e65861dbb38fd4ec6df2d3090783501e8daa7ee847e0
font_01_sfnt_off0001d166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D166 11196 bytes
SHA-256: 539bdda5a482be58352298eacfcad3e56180a01d0f9d8e740186017b67e9a09a
font_02_sfnt_off0001eb36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EB36 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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