Malicious PDF — malware analysis report

Static analysis result for SHA-256 56ccb56d4095570e…

MALICIOUS

PDF

91.3 KB Created: 2021-06-27 19:46:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 880e371eb72dca258ac775c52caceee0 SHA-1: ccce3094654667a99273e9b83dcf2dc280be0165 SHA-256: 56ccb56d4095570e5c527f64050dc7883e1a665e5b0f56f33be7d93a9e5c69d5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs pointing to compromised CMS upload storage and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with malicious PDFs designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/09a7f497482dd9ff1e86d344dc386b7c/81783638501.pdf
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/8b31550fde686861288b8334d29e8fc8/dafajapenivenixadonivote.pdf
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/6h26fn9b0773s7oprgge1f96u4/turovudilipoka.pdf
    • https://togeltop.net/contents//files/7480920600.pdf
    • http://geose.ru/userfiles/file/zidapaf.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/d2aab628a7e553098093ab3d9b79093b/jivewapexavigomipu.pdf
    • http://vejwun.cz/images/44131158337.pdf
    • http://kapsalonindex.nl/images/uploads/godusa.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7e48c148c5---vonefekosobidubejezijido.pdf
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/e0a40atlkj8vonu4st1sb6iign/mojuwuvix.pdf
    • https://pablohernandes.com/wp-content/plugins/super-forms/uploads/php/files/98bdc3700e99a0ab8a51fb41cf4d93fd/mafijukorizokiti.pdf
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160beaa2b0ca86---80539660459.pdf
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5ad614e0f---96222441016.pdf
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/9e2a84ced65062627c5927d2da53adfd/zojexakuk.pdf
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082357ed4fa4---jobuvowozeresolerir.pdf
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/d8cc4a598d583bb6080e2b5e2be4cd6b/gepimusof.pdf
    • http://cherishedmomentphotos.com/clients/8/84/84fe84b553acfcd191e166b7401b6f02/File/69999163798.pdf
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096d4cf87b07---72350551618.pdf
    • http://chocoenglish.com/_UploadFile/Images/file/jevesilasalidibaku.pdf
    • http://jyotiacademicpress.org/uploads/file/20862310049.pdf
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/16087f4ecbffdf---vomajalig.pdf
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/3386ee616ec9e667fcb9e052982c33c6/gegaxedonexosapasujak.pdf
    • http://enjoy.sk/editor_uploads/system/files/donevufedifabavijidobozit.pdf
    • http://afgventuregroup.com/cfiles/file/93163538522
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=girl+scouts+of+greater+los+angeles
    • 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_off0000fe2c.bin
532a592b6c313bcf4dd9037ddfe43ba73f4ab1eb9c3f1a77c40178d0d24f0a8c
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2C 18068 bytes
font_01_sfnt_off00012d93.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D93 16792 bytes
font_02_sfnt_off000145aa.bin
98154356553f0556cd35075f5c36a4aaca7205415c6adb2d077731253ef091d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x145AA 10652 bytes