Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ca7fb7e95291c40…

MALICIOUS

PDF

82.7 KB Created: 2021-10-13 12:56:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 7800a1195bc0761fc7c5a181dfd2d11e SHA-1: a6d3efe494db54dc472426434753da739ba611d2 SHA-256: 5ca7fb7e95291c401cb3480939c91437375dfe38bdd8465fa86baf12bdab3e63
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm or phishing lure. The presence of external URIs and a link farm on disposable hosting further supports this. No scripts were extracted, but the PDF structure itself is used to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/5e07cb26006938206d4cf3cd17a6e84e/49180365142.pdf In PDF document text
    • http://k9careclinic.in/ckeditor/ckfinder/userfiles/files/73615792459.pdfIn PDF document text
    • http://booklandbooks.com/userfiles/file/rotedebonazo.pdfIn PDF document text
    • http://clinton.abwingsmd.com/uploads/files/94524630474.pdfIn PDF document text
    • http://wx-bm.cn/upload/ckimg/files/202109241242594853.pdfIn PDF document text
    • http://zamaro.info/images/fcke_files/file/tuneku.pdfIn PDF document text
    • http://theartofdesign.nl/ckfinder/userfiles/files/43667649167.pdfIn PDF document text
    • https://digireg.it/upload/vetezajovumuzenasonoguwa.pdfIn PDF document text
    • http://townofwinslowin.com/flash/townofwinslowin.com/file/17243019614.pdfIn PDF document text
    • http://rubivina.com/Images_upload/files/lokivedimakev.pdfIn PDF document text
    • https://laps.pl/userfiles/file/jajujanaxozibozivox.pdfIn PDF document text
    • http://theartofdesign.nl/ckfinder/userfiles/files/didujeduganukotudimika.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/54e18e441b2ffac5deaaea3d469a0a3e/36059586907.pdfIn PDF document text
    • https://x-software.cz/data/file/52608488322.pdfIn PDF document text
    • http://lsneotek.com/ckupload/files/38019905611.pdfIn PDF document text
    • http://niestachow.pl/data/aktualnosci_imgs/file/vediw.pdfIn PDF document text
    • https://combrooncom.com/contents/files/sadekuxaxinuloza.pdfIn PDF document text
    • http://xn----1-6cdapb2bdyqawnpcindqfc.xn--p1ai/media/file/44640648578.pdfIn PDF document text
    • https://urology-andrology.com/userfiles/file/voropimuwevak.pdfIn PDF document text
    • http://xn--tnqz8hz5cb8l.com/upload/files/vinig.pdfIn PDF document text
    • http://burchiellati.com/file_fck/file/5276780900.pdfIn PDF document text
    • http://topspeed4wd.com/ckfinder/userfiles/files/topozatiwebituvolowinidu.pdfIn PDF document text
    • http://dubilex.com/userfiles/files/61103561297.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/5euubdifh5pg0mcdfj9et90t5e/95488081247.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/cmwvf4RlXg4/uplcv?utm_term=steroid+shot+carpal+tunnelPDF link annotation
    • 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_off0000dca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA8 18304 bytes
SHA-256: 0a8ea28ad26753b5c6a023e0a1e3b9c70abea2c099c7bcefa1e8dbabaf2ba43d
font_01_sfnt_off00010c3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C3F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12456 10784 bytes
SHA-256: eacf3c4d3f8d162752aecc6550b0bd393012fad627aac67285d524164f42b88b

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