Malicious PDF — malware analysis report

Static analysis result for SHA-256 d78fd9b96b7bf0e4…

MALICIOUS

PDF

82.5 KB Created: 2021-03-15 22:53:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ae237839a9382ec06339df12e3d1595 SHA-1: d1adc1d44cf26dfe02bba3f046e9c38a1dc5f5f7 SHA-256: d78fd9b96b7bf0e4d57915182485c8cdd969da718092ac7fd9c567b03629b929
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a high number of external links, with heuristics indicating a link farm and suspicious, invisible links. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a spearphishing attachment designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://dafemum.ru/strik?utm_term=line+6+pod+go+guitar+multi-effects+floor+processor+review
    • https://xunumiselodaz.weebly.com/uploads/1/3/0/7/130775676/3545586.pdf
    • https://xizuxikeg.weebly.com/uploads/1/3/0/7/130740292/7d8c9.pdf
    • http://glossywp.online/19243051624zfz1.pdf
    • https://cdn-cms.f-static.net/uploads/4501656/normal_600c7f935dc92.pdf
    • http://cardioactiveuficiale.site/pubozufufumixamafefis0y8in.pdf
    • http://securitycheckingbrowservkcom.xyz/guion_de_pastorela_navidea_para_adultosodn3m.pdf
    • https://cdn-cms.f-static.net/uploads/4385021/normal_601e45e19aabf.pdf
    • https://static.s123-cdn-static.com/uploads/4409095/normal_5fe102b0683ce.pdf
    • https://xefigokilevugez.weebly.com/uploads/1/3/5/2/135299251/f325f235e1fccf6.pdf
    • http://copyrighthelpcentral.com/grammatical_structures_in_english1afab.pdf
    • https://tirepululavapiw.weebly.com/uploads/1/3/4/5/134576363/mawajetapiv_seninabixobe_wovujemuni.pdf
    • http://gvidilon.ru/descargar_popurri_de_antony_santo_en_vivovd87c.pdf
    • https://jitedamanun.weebly.com/uploads/1/3/4/6/134627504/31b006f7925746.pdf
    • https://cdn-cms.f-static.net/uploads/4468572/normal_600e65bf0f052.pdf
    • https://cdn-cms.f-static.net/uploads/4369333/normal_600fa045d57fd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://1cdd1dcb-54a5-4750-95ad-c4cce9a68cd1.filesusr.com/ugd/1e32c2_05d65d5c59a64572a52808d5b630e107.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1d0b0b30-0029-4d79-88fc-2a99254c60b4/vekiluwunanaf.pdf
    • https://e13cb47a-ba10-42f5-a9cf-93317d05919f.filesusr.com/ugd/1fa6dd_30e48cff36c84b5eb453b2d748ccfe64.pdf?index=true
    • https://6e8b94c7-278c-4a65-9c30-8d61c93a8f31.filesusr.com/ugd/9ff9b8_d0cc9b4c4b7f4b89b70abf576daa615b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/30d7de90-ed80-460a-a5b3-f7850aecf8af/39819249559.pdf
    • 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_off0001016e.bin
f2eb47696e7aff7b65bec530fdfb80aab328cb8a749298d59c4df1eed21a32da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1016E 5756 bytes
font_01_sfnt_off00011519.bin
cd5c812690c084bcf0bc19a0e97596f99f1553f9f5a030a886282310f3d28f0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11519 11588 bytes

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