Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2c2d9debf0c2a3f…

MALICIOUS

PDF

88.7 KB Created: 2021-07-14 02:58:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a1424bc8cf014a76a2082a80c5f4765c SHA-1: 123a6163223dae03de5579ad0896e9efc4d86a29 SHA-256: c2c2d9debf0c2a3f3e587a419b523702ec194eee86cb856d056ab40bb03b91f9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting a phishing or malware distribution attempt. The presence of a 'download button' heuristic further supports a lure-based attack. ClamAV detection confirms the malicious nature of the file, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://akvaguru.hu/user/file/77961825534.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075907631da7---26343935252.pdf
    • http://coimbrasoftware.hu/images/uploads/files/14249068734.pdf
    • https://hogies.com/includes/template/uploads/file/58818230536.pdf
    • http://www.anieliasfx.com/uploads/textareas/file/bimifuranugixipisu.pdf
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160846ac35bcee---63812071080.pdf
    • https://balajitutorial.com/admin/userfiles/file/vemarodosewixi.pdf
    • https://aksusu.com/upload/files/22755274526.pdf
    • http://mpti.ru/userfiles/file/pavuwotijoxasopo.pdf
    • http://asupuro.com/upload/save_image/files/gotexub.pdf
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608ccee23aa50---batolejudavupogobos.pdf
    • http://jentretiens.ch/uploadimage/3615184245.pdf
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/667065ffd28c8da430008df21f78ec43/22093849571.pdf
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b33186d499d---mirofejadukuzedigetidul.pdf
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608887ad838a6---46232022351.pdf
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160a0449f0e56c---fuxotewo.pdf
    • http://monkey-do.net/userfiles/file/tivexojirafez.pdf
    • https://systematix.pl/userfiles/file/10030956917.pdf
    • http://jmdfhjl.com/fckeditor/userimages/file/3646855683.pdf
    • http://danburyhighclassof1961.com/clients/b/b4/b42d7d7907ff1a67dd6fd366dd3c6775/File/radizurena.pdf
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/e3ffed7c369d4af05063e413b091b137/movojezaju.pdf
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16085e8f12c0e8---31222147611.pdf
    • https://petek.biz/resimler/files/junulakosugikuxozasib.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=rangasthalam+tamil+dubbed+movie+download+in+isaidub
    • 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_off0000f759.bin
67870c5f86c152146f382ba865906703816c50006209b21754dac678b3b4d68b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF759 16988 bytes
font_01_sfnt_off000123a2.bin
e6fba9bdb183d7011fb2b16ea8bde83889b5be2f66494d8b8440363e5c535890
pdf-font-stream PDF embedded font (sfnt) at offset 0x123A2 11032 bytes
font_02_sfnt_off00013ceb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13CEB 16792 bytes