Malicious PDF — malware analysis report

Static analysis result for SHA-256 56f883e6feaeddd6…

MALICIOUS

PDF

81.9 KB Created: 2021-04-04 13:09:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: cfde5d1c5307b9bcc3feb9386f2911de SHA-1: ae6bc5a3c35e0a9d3f13cba7e2d3a20bcc5ffc1d SHA-256: 56f883e6feaeddd65cbc7d88141ca4210fc1e1f3f0b24dd6ecf533c101671201
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains a large number of external links, many of which point to PDFs hosted on cloud storage, suggesting a link farm or redirection mechanism. One prominent external URI, https://vilenefex.ru/strik?utm_term=ishmael+book+daniel+quinn, is likely the primary malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://vilenefex.ru/strik?utm_term=ishmael+book+daniel+quinn PDF link annotation
    • http://infokurs.design/kenmore_elite_he5_dryer_f01_erroruhmjt.pdfIn PDF document text
    • https://cdn.sqhk.co/zivuputid/idhglQk/sagilulemorivif.pdfIn PDF document text
    • https://cdn.sqhk.co/nomelafu/wrnjjah/44967378602.pdfIn PDF document text
    • http://qrastenmap.online/3720351403ckyi0.pdfIn PDF document text
    • https://cdn.sqhk.co/lewikokezina/fjjMcqc/color_swirl_game.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://84daacc9-7e90-4c5d-b1ed-526950900c49.filesusr.com/ugd/73f3b0_6739d6ea4dd043959bcb367b63726377.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/51185959934.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/xizajovipoxegiwofasixeli.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/wafoxafekizupame.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/colostomy_dietary_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/digitech_rp1000_manuale_italiano.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/32722064748.pdfIn PDF document text
    • https://f9fc249e-2e6a-4908-9eb0-88005465a50d.filesusr.com/ugd/2530ee_647bc203411b4a87b8b7b5ac39322881.pdf?index=trueIn PDF document text
    • https://3633ae4e-9acc-45df-885e-1bfa1481cb44.filesusr.com/ugd/e73054_4480c6f9b37f48158243fc2d911f21ed.pdf?index=trueIn PDF document text
    • https://c78ffd2e-fc3d-4272-86ca-968d835fb7ad.filesusr.com/ugd/0f9ef0_91ef9e61f2074475ac293da06e214821.pdf?index=trueIn PDF document text
    • https://11ab4cf5-156d-4417-99e9-5039b2a7eb5f.filesusr.com/ugd/82d61e_d79de2a076654530b4858318ade82935.pdf?index=trueIn PDF document text
    • https://e8f98835-b194-42a5-b43f-fe2f29920dd6.filesusr.com/ugd/bf650e_25a5515655b74d7193401388237b5224.pdf?index=trueIn PDF document text
    • https://df9240ce-57b4-430e-a582-521170ca5232.filesusr.com/ugd/10b03a_b69b7c55bc5b41f79893a89f1f6f5f72.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/56885361920.pdfIn PDF document text
    • https://6a24fdd2-d4a5-4c4b-882b-0f3115751bcf.filesusr.com/ugd/04e6f9_9bdfd13d61044f3896da4e43fd999be2.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10308 5236 bytes
SHA-256: 6702f64c25e27ba0191babf44c0b6899c70e749c7007cb47877fcbe1b39c7b58
font_01_sfnt_off000114a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114A5 11068 bytes
SHA-256: c7ff56dbfe238146cc84fb968515e94414e587574388c4c3f660acdb6c2888cb

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