Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc15ace52969c8b9…

MALICIOUS

PDF

82.9 KB Created: 2021-07-02 06:49:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e92e702729c4e8833943c17f38b8e1c5 SHA-1: 19aec3e0d478628d1bae7227439e1e5f6283ca8b SHA-256: cc15ace52969c8b9e9a4942757b5e246cd6689b052ab3c08b7c756ca100e7a8b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains numerous links pointing to compromised websites and disposable hosting, suggesting it functions as a link farm. The presence of external URIs and the overall structure indicate an attempt to direct users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://shosholoza.de/file/puwojorib.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ad9479c9e---tisutabesepolufedagog.pdf
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ceeeba4a28d---25570511020.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160927cf66ba95---fawokogeruxotibo.pdf
    • http://kaies.cn/upfiles/210629112038395144ah4m6g.pdf
    • http://longearedhounds.com/clients/65743/File/99830520292.pdf
    • https://leavingcare3plus.ch/userfiles/files/xuxelipupawetogepuro.pdf
    • http://happypalettebnb.com/CKEdit/upload/files/76702973475.pdf
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/oj701mg70an1keemgo78gqegi5/51203264310.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b70408e7c01---niluzizasokezerizin.pdf
    • https://ivaco.it/file/werazojoxelikikorunexapam.pdf
    • http://dekoblickfang.de/userfiles/file/tobaxewovenud.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16097739ddad56---20099495242.pdf
    • http://liebherr-tr.com/userfiles/file/75520819208.pdf
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dcea56c760e---90054094968.pdf
    • http://curry-box-deluxe.de/userfiles/file/76972869869.pdf
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/0hjcoj9ngf09bha1dg8ehffo31/17313355709.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d38cca6183---folipegapu.pdf
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/bb56ed3695f1a4c2f1780aa8c1b0f850/zibuzajawejura.pdf
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa44a353ad8---91825387045.pdf
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/c4d25fe5c87efe20db5300f9b1daa0c3/bibunoradig.pdf
    • http://intestinalfortitude.org/clients/0/0c/0cf504f131cb0201443a7bd449519f4a/File/lokefuvefivobiwusodi.pdf
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/ijannlqffa1j8uevf9s9ckktk3/14958580959.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=ibps+papers+pdf
    • 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_off0000e3f6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F6 16792 bytes
font_01_sfnt_off0000fc0d.bin
671ee09a3e307b88d1b51e639fe68b0f2c0e22675d06d05ef6702b6471cb4174
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0D 10120 bytes
font_02_sfnt_off0001127f.bin
6cdd3d723b02117d17975959067c06985673bcff5274d209d93a7c82af3df0a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x1127F 16908 bytes