Malicious PDF — malware analysis report

Static analysis result for SHA-256 e82e10b36819da66…

MALICIOUS

PDF

87.5 KB Created: 2021-08-01 16:12:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4b38c47ad6270b5ec39be2fe8d2d1fdb SHA-1: e69e82e071369135dd7ac582f13b26606ac624be SHA-256: e82e10b36819da66be927db1ff36c1d1477f5468842b9b871827a3667ab68804
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, aligning with the observed link farm behavior. No scripts were extracted, but the structure and URL targets are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/946b7ac3c95498123d28338b7c81a139/49960494820.pdf In PDF document text
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/16088300cc73fb---20398075906.pdfIn PDF document text
    • http://asiancfea.org/userfiles/file/sowuzotofijaxub.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/d445fd49f88272928e8b3f66d3ff82d5/lixigobigotonu.pdfIn PDF document text
    • http://museodegliarazzimarsala.com/userfiles/files/ratapil.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7835b185e7---vanek.pdfIn PDF document text
    • http://solarwindependence.com/ckfinder/userfiles/files/84923767260.pdfIn PDF document text
    • https://airshow-bg.com/file/58074070394.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7a5b38cc7---64555795274.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16083b176039bf---pitave.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/4736b8ab74943a9f04fdaf8e3c1018e2/gatumoxaxamageno.pdfIn PDF document text
    • http://teleinwestor.com/userfiles/file/fifuvezobajonopazasunan.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5a80c3c3b---fisovonemotuguzo.pdfIn PDF document text
    • http://www.predia.cz/userfiles/file/zesufaxedibivomapuwefo.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/t71aeu30gv4dmodeiqbgr8kirq/96950430710.pdfIn PDF document text
    • http://synerfreight.com/syner_upload/images/files/67923748766.pdfIn PDF document text
    • http://thermcom.cz/userfiles/file/ronusu.pdfIn PDF document text
    • http://szzxwx.com/Upload/Upload/file/20216208312182.pdfIn PDF document text
    • http://geoscan.it/userfiles/files/62939067642.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/p4amotm9autdf057dps0om8c4j/zonore.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075ecea5215d---golerogebejedow.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file///16653359705.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=how+do+you+play+deer+in+the+headlights+gamePDF link annotation
    • https://tes-sys.com/uploads/ckfinder/files/20210704/16253402446578.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF100 17292 bytes
SHA-256: 447b100e00b33a9ae04bd37629c4b7badbce618f48e82ebf715b2a0f4b568df2
font_01_sfnt_off00011e6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E6D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13684 11132 bytes
SHA-256: 5b7f42e7b3479077a9b2bd684fe5f381ab7a00528a1b9b87b38d962a79888eec

Open this report in the interactive analyzer, or submit your own file for analysis.