Malicious PDF — malware analysis report

Static analysis result for SHA-256 932cc23d874b1f69…

MALICIOUS

PDF

94.8 KB Created: 2021-07-04 17:34:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cbaacc31274425e71b8f663ab0d2fa14 SHA-1: caf30e2f3dd8bb8d5e1eb06260a929f3a6339bf2 SHA-256: 932cc23d874b1f69f7e075438e4350ca9c41a71796bd22d559c66b674204fc15
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by a ML classifier and ClamAV, indicating a phishing or trojan payload. It contains a link farm pointing to numerous URLs, many hosted on compromised WordPress sites or disposable domains, suggesting an attempt to redirect users to malicious content. The presence of multiple distinct hosts and a high number of links per host further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://hitecds.com/userfiles/file/dofinotez.pdf
    • http://watsonwilliamsreunion.com/clients/82103/File/61710588868.pdf
    • http://ibconsulting.it/userfiles/files/ropanabakigigoletup.pdf
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/ad0fc9281f73316efdbf1acc0c964355/74155853751.pdf
    • http://sacoorhealth.pt/site/upload/file/42980032624.pdf
    • http://4bx.pl/public/file/41614090342.pdf
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/ab1g3n47llai8op75oldua7q95/56163361274.pdf
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16098b2c51bda5---41486421518.pdf
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/ls5ctcbh874qh9kl4drc9hc1kf/wudaxemuveziguliso.pdf
    • http://aranykoronakft.hu/userfiles/file/38153362598.pdf
    • http://ingenermarket.ru/userfiles/nowijowafiretupu.pdf
    • http://10glazsikeyrosa.ru/file/wezegujaboro.pdf
    • http://blbr365.com/userfiles/file/1623948984.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/5c2c5d85aa3e3ae4a7539660317422b0/gopinevenunelo.pdf
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/c3fc665df245b209c10ebf073f60e21e/jaruf.pdf
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/s0vq514jmkkm37bqa6r8bou462/91034713877.pdf
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/375dfa102a46254cf169fe7e5d8641a2/muvuwidawitebal.pdf
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/1e5jagmo1hv5631avig1s8ia22/86929540422.pdf
    • http://alhouti.com/userfiles/file/829423748.pdf
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/41eb4faf99ce78a36fce5c2b7beb1fb5/lurevuvomomi.pdf
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/uqj3cjrte04nqgm891lv7h6dgn/zidonajemapokefuwawar.pdf
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/fd0212ee9e08da650a078ea53df9107c/97190640166.pdf
    • http://ithaca1962.com/clients/41687/File/kadajobowebefowugozogefin.pdf
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079f80b24a1d---73780798732.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160cc87ff2b92f---19226808854.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=issues+with+bmi
    • 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_off00010ec1.bin
00d772bb7afd5a9e0f2a7d5f2df339aecbbfbfb2cc73292a2b8f9aa229c90553
pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC1 18072 bytes
font_01_sfnt_off00013e2d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13E2D 16792 bytes
font_02_sfnt_off00015644.bin
8daa96c5c86aad41c2af40a05405c8653f2b2266f2513e9b82c4a293a7b819b5
pdf-font-stream PDF embedded font (sfnt) at offset 0x15644 10120 bytes