Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1070e0b341657bb…

MALICIOUS

PDF

82.3 KB Created: 2021-09-01 08:55:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 52a7e090ca0d1ec61059be4c6ab18da9 SHA-1: c51578a06439a58a1750cab61fbfc281f75a623f SHA-256: d1070e0b341657bb24f0960acaf7b03b882c3209a25848b9da5a21c49916d747
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' further supports this. No scripts were extracted, but the overall structure and URL distribution point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://crysiq.ru/uplcv?utm_term=advanced+vocabulary+and+structure+practice+key PDF link annotation
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/m6qa2d999h6miam99l1mq7n2v8/45988515040.pdfIn PDF document text
    • http://gewald.ru/content/Files/bujerutejufe.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096063f85685---datufazebuxudazefo.pdfIn PDF document text
    • http://suacuacuonthanhhoa.com/upload/files/53736844815.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ba20d777c8b---11405388098.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/jobotajek.pdfIn PDF document text
    • http://baovethanglongmb.com/upload/files/gufuw.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/86367939796.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/7a66b2d3b5ad4cdd125b4dc9888c5d20/30533658932.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/84841251463.pdfIn PDF document text
    • http://abwgulfport.com/uploads/files/jotupuvizaladukajafojig.pdfIn PDF document text
    • https://clubforeducation.com/FCKeditor/userfiles/file/gokupasuxajedowul.pdfIn PDF document text
    • https://belloverde.net/emailer/file/78076945262.pdfIn PDF document text
    • https://tyeetomsfishing.com/userfiles/file/38584202906.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16079603f17810---85616677895.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f03bcea3274---nivesigozazomurizakezof.pdfIn PDF document text
    • http://vncdata.net/app/webroot/uploads/files/71149303929.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/41266850727.pdfIn PDF document text
    • http://westernstudioservice.com/admin/userfiles/file/kexebeved.pdfIn PDF document text
    • http://championsview.net/userimages/154793576.pdfIn PDF document text
    • https://implant-drill.com/userfiles/file/sotikakev.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/ffbb0782af4b3726cff2dedfbbd1785c/javirokuditikuwuvuwugoxep.pdfIn PDF document text
    • https://repare-ton-smartphone.com/userfiles/file/nopovevi.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA8 16572 bytes
SHA-256: ac1fb1ea8b63dc15e0716facb0d1ebd54adc784126266ee3f7b443b86bb6a7cd
font_01_sfnt_off000109ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000121c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121C3 11000 bytes
SHA-256: fbdeefc3904a5d1b924b9650efa8873869442d91c8e23162debec6b14b6dc6ec

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