Malicious PDF — malware analysis report

Static analysis result for SHA-256 815de7c918c632f1…

MALICIOUS

PDF

81.9 KB Created: 2021-03-21 04:11:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b441980dcf3af20a161a340f278cc9af SHA-1: c84e7608bf9943daba01e641c54ca7d2fc736446 SHA-256: 815de7c918c632f16417a8a23405a853fa8fe8447708975664c621e8de0a70a0
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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.
  • 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://xezojetit.ru/wix?keyword=clash+of+clans+hack+rooted+android PDF link annotation
    • http://redpandarecycling.com/askep_space_occupying_lesionl040m.pdfIn PDF document text
    • http://sportplays.ru/hp_photosmart_d110_series_scanner_not_working5ol0s.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369163/normal_6029282f27b25.pdfIn PDF document text
    • http://lozuzaragujeb.mypressonline.com/how_to_crochet_a_square_in_round.pdfIn PDF document text
    • https://raguwagoneneza.weebly.com/uploads/1/3/1/3/131384547/tebodupawoxi_relano.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487416/normal_5fc7b37b3640c.pdfIn PDF document text
    • https://powumebaporisav.weebly.com/uploads/1/3/4/8/134891471/rusavimepa.pdfIn PDF document text
    • https://zalinojawovuga.weebly.com/uploads/1/3/4/8/134886974/gukulufujodetuw-repalapelijir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374535/normal_5fd3c8465e421.pdfIn PDF document text
    • http://medazuxa.mywebcommunity.org/botany_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491934/normal_60567e8681dc4.pdfIn PDF document text
    • https://pilolekolaf.weebly.com/uploads/1/3/4/6/134655903/9965552.pdfIn PDF document text
    • http://iwhite.space/lozenimujakiralgry9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388432/normal_60519eddd0434.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377662/normal_600a3f6ea0722.pdfIn PDF document text
    • http://mynasert.online/39237496471ah5ed.pdfIn PDF document text
    • http://jekefidaz.mygamesonline.org/37382763278.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368240/normal_5fc7f307f01ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477137/normal_603a4432719bd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_bb58463291e74842890bbeceb3f71933.pdf?index=trueIn PDF document text
    • https://c301b42c-deab-4116-afcd-a09dd0728425.filesusr.com/ugd/4bb894_cea2c8ce1b8b4e15a084d09b8ce0e98a.pdf?index=trueIn PDF document text
    • https://f405dec1-7f90-4f4c-a861-5286f67d0127.filesusr.com/ugd/ab922d_30a2ea977a184fa2b9996bb3ca775fdb.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF513 4984 bytes
SHA-256: fe54befa7ecd60b1737feee112287ba56214326a7df5657b44e6ac788197055d
font_01_sfnt_off000105f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F0 11132 bytes
SHA-256: eefda795c4e8d3676d09c3e4ad133b4e4d6dde36c7434ca8d07382a2528113b2
font_02_sfnt_off00012bd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BD4 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f