Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a68ca7899649197…

MALICIOUS

PDF

94.2 KB Created: 2021-07-31 23:46:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c3b7205e851d037e03bac3fecbfa4b07 SHA-1: fbb7a899efe13762a54ec0217fb93142863604f1 SHA-256: 6a68ca78996491978709970aa84dba16ad295595d9fa1af987a48fe5b276aabb
176 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as 'Pdf.Phishing.Trojan' and an ML classifier indicated a high probability of maliciousness. The document functions as a link farm, containing numerous URLs that point to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute or redirect to malicious content. The presence of multiple distinct hosts and the use of UTM parameters in some URLs indicate a coordinated effort for SEO manipulation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://wjcopy.com/upload/files/dosajidudenonofeveviraf.pdf
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/0463bfb13e2d2df4d0a58bfcf09c847c/ragenememugiz.pdf
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/vg6hmp7qfo1ailjaqvmaeoaa5s/retolenuleralirulu.pdf
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce604dd2e5---53604211750.pdf
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/mqr0os43dlum0bv84gruq115g7/ramefapafewavupub.pdf
    • https://ph2020.org/FCKeditor/file/tejidijuvilozovaw.pdf
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/d464749e6b877f3a22d304d98c8349a9/tonufatiwunegu.pdf
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/24115e157e1b412693139d29e33f9722/fumexefenejarekelilafoki.pdf
    • http://ipceurope.eu/assets/file/93980599204.pdf
    • https://urbanlivin.lu/userfiles/files/pumugo.pdf
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/4d546c58ef055296185e696cb9c915e7/91902546687.pdf
    • http://videofilm-tv.ru/content/File/gilexe.pdf
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/e62623e8e5b38c7f84c29aa524b0cb14/jerodalujo.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bbab0df13245ebc88e442a2251deb455/tuzaridanipekulup.pdf
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/dfa34db5fad8fa906d31aef30f514252/zusarewe.pdf
    • http://banquat.com/userfiles/files/40054185354.pdf
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9a17d0d3d1---27840710234.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e78e7e92e0---metisaginuwokiwolek.pdf
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c702b7e52b3---6474071519.pdf
    • http://piau-po21inn.com/CKEdit/upload/files/boxirijajamijukozonako.pdf
    • http://gz-theoutfit.com/UploadFiles/FCKeditor/20210730045236.pdf
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097ee3e36c58---nodijora.pdf
    • http://vejwun.cz/images/jadoginiwesedik.pdf
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c370a9373a1---62072148405.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=pok%C3%A9mon+home+mystery+gift+codes+june+2020
    • 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_off0000f296.bin
9e2dc4544dfd30dc415ebdf5375fd4fb29072c7693686f1d0c5c73ef201b5146
pdf-font-stream PDF embedded font (sfnt) at offset 0xF296 17124 bytes
font_01_sfnt_off00011f42.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F42 16792 bytes
font_02_sfnt_off00013759.bin
987ce0aeda0ec228ad162836f28224ba9a0614564ac742b88a7e749405b19fc6
pdf-font-stream PDF embedded font (sfnt) at offset 0x13759 11548 bytes
font_03_sfnt_off00015219.bin
eb83fb48a2f60ac59fad768156047f025764cad4052c8f34695a9c8dd2456ad8
pdf-font-stream PDF embedded font (sfnt) at offset 0x15219 16132 bytes