Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6c7b4091829f7c1…

MALICIOUS

PDF

75.1 KB Created: 2021-06-24 22:10:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f100dcdde7351fa94c48737481d945a SHA-1: 67bada02bf046e897a9d71534f4328628848376a SHA-256: f6c7b4091829f7c1ad42236959c4436a28df7d468a81c29ba516038353889325
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable domains, suggesting an intent to lure users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://oniceh.ru/uplcv?utm_term=que+son+los+valores+eticos+pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/b760ffbc1a7aaf237150a5405f80851f/tikojajomobivominu.pdf
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/a354f627eb0115ee524e36e5ea52192b/kapazodidufelipufal.pdf
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/8859sj65bsvku3ueqc7fiahj0k/7510297795.pdf
    • https://rubyyadav.com/nbloom/fckuploads/file/dajaxonabadugawulomiwagu.pdf
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/1n237j280n3e2jcc5dseb3q9o4/limowanibeduferijuzes.pdf
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/f8ieuchrhnk35i2qeef8m9qa9p/57795579850.pdf
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/d7b051cb00df95eb64256d09e295ca20/38182445101.pdf
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/vkv1vtg6sprtmn5102qrq5tovq/refagoxelije.pdf
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16085cbcb2e7c9---79088192892.pdf
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b5a9c748cd3---36974997316.pdf
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160772c12a5c5f---jimasaxevof.pdf
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/2478837bf54112057c82143409cd13e5/jifapogexerakidixamudi.pdf
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/s1p072ecn089oso9vbcqpdvpt9/bidetesam.pdf
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc662abf7de---waziba.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a1701aea546---rafotujumeguweter.pdf
    • http://biosite.ru/images/news/file/32739736336.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e73c.bin
82ca8a23397dea892afd314e8cf9a2d261e878a57642330c741fdb07cb1b880e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE73C 5268 bytes
font_01_sfnt_off0000f940.bin
f7e2e2cf5a1f343a33b5f4450f6b3cd2016bd3923a481f9e8acdc7e3f2ce699a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF940 11416 bytes

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