Malicious PDF — malware analysis report

Static analysis result for SHA-256 6384e7e0570a47aa…

MALICIOUS

PDF

90.9 KB Created: 2021-07-15 19:08:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 260557eb9bd19ded6998594d30a1de7c SHA-1: c6f02306d28200f1895ef93f220bdadf0cb79fed SHA-256: 6384e7e0570a47aa10cd417411ec7def2a7c13486b21421b1d955efbadd589a6
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. The presence of 'utm_term' parameters suggests tracking or redirection, common in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://huntic.ru/uplcv?utm_term=all+scriptures+is+inspired+by+god PDF link annotation
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b9a1bd4c10b---23803539223.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/pawunikupebuveronu.pdfIn PDF document text
    • http://drwatsonsr.com/clients/2/2b/2b9a0cf27321ceab3a47fbd10bf94d34/File/fududede.pdfIn PDF document text
    • http://goksirlambinowice.pl/img/upload/files/susefexalebidakiwedokowux.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1608369e93968f---jawed.pdfIn PDF document text
    • https://masterjobintl.com/ckfinder/userfiles/files/38895935842.pdfIn PDF document text
    • https://mvpartners.be/images/uploadedimages/file/50580441133.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160d4d2b060e6a---zifizukurolave.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/62342157755.pdfIn PDF document text
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/r18ba77vlecua0p8gr9lg0mht4/34585748357.pdfIn PDF document text
    • http://playeasypiano.com/resources/fck_images/ramagikigijile.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-7-2/20210702171516966786.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc397338b9---93475047517.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/c396cdb9257383d2e127142fb39f29b8/15863820659.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609696a32fff8---91054575254.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/93793e4eb2e299072075a2703dbf2cbf/galobixuwufagomekokitoji.pdfIn PDF document text
    • http://bidmitt.com/img/files/file/fenewa.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/8569m9tca1d4bmcvto75oiro50/dasumizif.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/wuzukelamaxujezup.pdfIn PDF document text
    • http://spamsmsgiare.com/media/ftp/file/18308424180.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/mefofopulexaf.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ceba498f54d---63201498086.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/c81cf6835c4fb411b4b1f2048c41a922/dikefipi.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_off0000fae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE6 18336 bytes
SHA-256: e713d276b7f1bc1d9156b1579a79641cdbf656ceea1cb88b9cc40ff7f065a13c
font_01_sfnt_off00012b8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B8F 10864 bytes
SHA-256: d4ec59bc2d55d9fb65d362379f0d6c8cb086b61555080c2f6b965a4cefeb65bd
font_02_sfnt_off0001445d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1445D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1