Malicious PDF — malware analysis report

Static analysis result for SHA-256 508b9edb06fcfec9…

MALICIOUS

PDF

78.4 KB Created: 2021-07-05 02:43:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5c6cade33ab5de5dc2254b19cb6db371 SHA-1: 1bb1a42a6a941d8b26f0766499a2d2dccdcf91a5 SHA-256: 508b9edb06fcfec9381ffffb6ed3133ba735677cf8e34776bfefb18d5b85b140
156 Risk Score

Malware Insights

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

The 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, with many URLs pointing to potentially compromised WordPress sites or disposable hosting. The embedded URLs suggest the document's purpose is to redirect users to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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 http://vote4dannybarry.com/clients/2/2f/2f5d4f67c16906f9b09010289963de11/File/rofadotu.pdf
    • https://likeevent.it/writable/public/userfiles/file/fawug.pdf
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/16078e3e247d67---zifenazaxa.pdf
    • http://centronegozi.com/public/34376167142.pdf
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ccf2dcebb25---bowitenotisivom.pdf
    • http://classicalgardenstatues.com/uplds/file/vezobudemeditotifevudoruf.pdf
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16075cd0c80c56---18844623628.pdf
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2031a34ee---goxexogokovogopuridur.pdf
    • https://debcopharma.com/userfiles/file/79657041766.pdf
    • http://seanmore.com/userData/board/file/56814083524.pdf
    • http://yournamebadges.com/withyourdog/cms_uploads/file/92039237183.pdf
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160807f187159f---bafuk.pdf
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/a04dc312f316609b3bff81f9bf069524/gejafexonusobasab.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078ed1235365---dipesi.pdf
    • https://mariapolis.net/ckfinder/userfiles/files/35730347922.pdf
    • http://zge-led.com/luodan/images/userfiles/file/63184351373.pdf
    • http://shhs69reunions.com/clients/e/e9/e92da0bc0099326815942f81a5c18dfc/File/28914060108.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/nsmpcm18i7vbp8q1o0cbjfmo40/mupewixu.pdf
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7cccb60db5---mataze.pdf
    • http://tuzvedo.hu/elemek/file/74122401762.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bec725a6604---doloxizo.pdf
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088a090851fb---57831483892.pdf
    • https://kingwaterpure.com/ckfinder/userfiles/files/nelikile.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd08fd7bcf---rirazev.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/c3aaeb4f709864e30762ec7464be6ba3/xaseja.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+color+with+acrylic+paint
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2f5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F5 16792 bytes
font_01_sfnt_off0000eb0c.bin
60b125fa4e37e9fdf48805416e5e72c7b900fedc5d52e4ac88bd98deab7cb622
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0C 10360 bytes
font_02_sfnt_off0001026b.bin
85890c09e18ab15a09f85c7bb744d68a38e4a70ce2ab9952c535a78161c5586f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1026B 16360 bytes