Malicious PDF — malware analysis report

Static analysis result for SHA-256 0172692b0da9748a…

MALICIOUS

PDF

96.8 KB Created: 2021-07-28 11:24:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: c0129cb938d83a2e9c2f421ec82634f1 SHA-1: 8f6340a60919e72ac9e83ebe3fb590f90de3b7de SHA-256: 0172692b0da9748a59dcbd9b71cbae6d613ca69418b391f8e4bb11b19d8d9074
196 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing or malware distribution lure. It contains numerous links, many pointing to compromised CMS upload directories, suggesting an attempt to host malicious files or redirect users. The presence of a 'Fake CAPTCHA' heuristic indicates the document is designed to deceive users into performing an action, likely to download a payload or visit a phishing page. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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://www.tvmreza.tv/ckfinder/userfiles/files/54262832091.pdf In PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090579cce2b2---41652034714.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/17ffccb471668c59fee1f217c697c29c/38362140436.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c63ba84b0---mirabefenezezanirisozo.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16070c42cc8a0b---45627210980.pdfIn PDF document text
    • https://fibra-optica.ro/ckfinder/userfiles/files/72269406098.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/c7f79ec385aabad2506bfc24116533e2/detud.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/33359906170.pdfIn PDF document text
    • http://senseoftourism.dk/userfiles/file/57236454216.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf8fe65a9f---98957862670.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/f43d6cdd364a797c93db03dba60ee954/pixaxasibelesome.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/gamowovo.pdfIn PDF document text
    • http://csc0851.com/userfiles/file/20210609160010_282z8h.pdfIn PDF document text
    • http://donghocasiochinhhang.net/uploads/userfiles/file/jolavutivipigawas.pdfIn PDF document text
    • http://c2r-auto.com/uploadfiles/file/2021060104535573499.pdfIn PDF document text
    • https://szalkasszorutacskok.hu/app/webroot/files/content/files/miwubukosikinore.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3eb951e60a---jodov.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c708c3954b2---50336475858.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd49b7fc55---lugetusix.pdfIn PDF document text
    • http://kaowei.tw/image/files/20210601_222952.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16086d2943f271---vavemopuxubidon.pdfIn PDF document text
    • http://flatadministration.com/uploades/fckeditorfile/kevodafewojaw.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/fjbrii9o9d7tjneeggf1ujdb34/detoluzaxak.pdfIn PDF document text
    • https://jaiminsales.com/ckfinder/userfiles/files/86727184406.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/39382235554218b83ae0cb822b7448ee/xuverutoxepobude.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=euro+truck+simulator+2+android+download+no+verificationPDF link annotation
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB8F 18132 bytes
SHA-256: 78b0588009bd4526edbd96b5d3fb2d2a615cc18148f8ba6cad4e6a9c17ddd5a8
font_01_sfnt_off00012b41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B41 16336 bytes
SHA-256: 47d6f68e1005e6641acb9d8903ddb6bb5dfd30cee0f01f0faded011c5708b1f3
font_02_sfnt_off0001416f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1416F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00015986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15986 11084 bytes
SHA-256: 412bcade67d7e69ae00124f0be3686c87d001182d48114211739ea7199ece1da

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