Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a0cd252f9c1dbb4…

MALICIOUS

PDF

86.1 KB Created: 2021-06-25 21:32:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e378ea37b9f74c42bd19fdab9cafaf3f SHA-1: 97e87b41a3a111dfed15ff1e198506ab9a0c0d34 SHA-256: 0a0cd252f9c1dbb4a96d952e8883b35ff7031f8a59da4cb22d7107359da88004
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs, while some are marked benign, contribute to the overall pattern of directing users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9762

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://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/70ddfae5cc1b092903443871eb89bd4c/18047390221.pdf
    • https://sce.tw/uploads/files/60b626ec05f9b.pdf
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/olih5kvqvjslm76qf7hvn4940n/75587623269.pdf
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/7136a149f7636240f9687c6648d02ea2/26160167036.pdf
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3fba929147---begolevijo.pdf
    • http://grandviewgroupresort.com/upload/files/38899754777.pdf
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/84f7fc6ceef1b04b6cb74dbfed210f1c/lolurifezinelarajitag.pdf
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/2m94s0fo71ahihoemh39kqioe2/29116316638.pdf
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/16087c65e5dfc4---11563302573.pdf
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d257c3c768---52951256867.pdf
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c2d9f964348---bitaz.pdf
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085be28f1ce7---faberegijiwupokon.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16078bb6fd4ab8---99958224975.pdf
    • http://raisemoneyonline.org/clients/6/69/691275cf9a36cab982b2498ebdc715be/File/basaj.pdf
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a74650123---52498278330.pdf
    • http://canevinclassof70.com/clients/6/6b/6b8b8ee0d314e59372afbcb75100d768/File/tulozagepadi.pdf
    • http://aostavet.it/userfiles/files/juvub.pdf
    • https://classicandcamper.co.uk/wp-content/plugins/super-forms/uploads/php/files/66m28m5snco1k88v23qgdifsfv/xumuzodokajajazu.pdf
    • http://usmleworkout.com/files/file/48508410654.pdf
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16072597b29375---sudawub.pdf
    • https://klcmekatronik.com/ckfinder/userfiles/files/bojibuluberumer.pdf
    • https://aiaciran.org/cache/fck_files/file/384606403.pdf
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16079a4307094c---33652411795.pdf
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/an7gk6gcq7bicog2o7tcsd86sh/vagakadijewopes.pdf
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/205c3beb3b44f298844a5ea142200e98/sepimibefexurizebe.pdf
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160876da0acecd---rizakunuvesonuzejop.pdf
    • http://akinmedikal.com/uploads/file/samafowiz.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=supplementary+consecutive+interior+angles
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d806.bin
6d6cb5ca6fee9963bf589a8a008f9be5559ac28bf3e4e214e8f1444392af0ef3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD806 11072 bytes
font_01_sfnt_off0000f1dd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DD 16792 bytes
font_02_sfnt_off000109ee.bin
34837fdfed7e6dc9e8c1ebc45eabef1064a6e89f8cd536305124148a4af1fb29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109EE 16168 bytes
font_03_sfnt_off00011f81.bin
56b3f57a727b3b10742706b5e65c26b3c2c49a9ccec7be98a47da631191079f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F81 16472 bytes

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