Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8f1b9ea99777446…

MALICIOUS

PDF

76.0 KB Created: 2021-03-14 03:23:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e5013ff5ebad40eb96d827fce05055f8 SHA-1: 30f9df6851e4d1ccd704117acc0fd47da265de5e SHA-256: d8f1b9ea9977744623fd0b8a687adf6bb150391131ee96f8fd5a759dd164de24
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with the primary one being to 'seumenha.ru'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm or SEO manipulation tactic. ClamAV detection and ML classification strongly indicate maliciousness, likely related to phishing or malware distribution. No scripts were extracted, but the document structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/award?keyword=cirurgia+de+hernia+inguinal+pdf PDF link annotation
    • http://migerov.xyz/how_much_do_crossfit_owners_makeg8nnb.pdfIn PDF document text
    • http://abzac.me/beethoven_sonata_op.106_en_si_bemol_mayor_hammerklavierhy40l.pdfIn PDF document text
    • http://discout.online/momento_de_inercia_circulolx510.pdfIn PDF document text
    • http://delaem-sami.online/animation_pictures_free_for_pcpmwxq.pdfIn PDF document text
    • http://copriyghtconfirmed.com/5991711630aauhj.pdfIn PDF document text
    • http://help-copyrightservice.xyz/46223909022mdad0.pdfIn PDF document text
    • https://dofolemabumef.weebly.com/uploads/1/3/4/4/134458616/34fe9dcc52e.pdfIn PDF document text
    • http://copyrights-notices-helps.com/mesiparun66y4g.pdfIn PDF document text
    • http://gebevojika.mygamesonline.org/tone_it_up_protein_bar_reviews.pdfIn PDF document text
    • http://rijunoje.mygamesonline.org/97484696527.pdfIn PDF document text
    • https://wefigoga.weebly.com/uploads/1/3/4/0/134041661/latowej.pdfIn PDF document text
    • https://zovalimifo.weebly.com/uploads/1/3/4/7/134728177/2530401.pdfIn PDF document text
    • https://gigojajalul.weebly.com/uploads/1/3/4/3/134320096/tipilemiribogoj.pdfIn PDF document text
    • http://xutefizil.getenjoyment.net/analytical_chemistry_instant_notes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zagubip/rekajesozixulugolebixuni.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/viratov.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/66181354734.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/6117821205.pdfIn PDF document text
    • https://1f2f8e77-98df-4c5e-b88a-83bc2b612b58.filesusr.com/ugd/5c7528_4370752cae6b4992aa79658913dcc3fb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/periodic_table_worksheet_answers_key.pdfIn PDF document text
    • http://pidodexogejax.myartsonline.com/agricultural_science_book.pdfIn PDF document text
    • https://bac325b5-3710-4a60-ba01-c1ac5e8a7650.filesusr.com/ugd/c111de_4862a39f55a044959ec2f0de40dab03f.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_off0000ee93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE93 5028 bytes
SHA-256: 795ddeb8b827556b1b156d57ae4a82e0a15f68f4c717f99ec894e27d255384b9
font_01_sfnt_off0000ffa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA7 10240 bytes
SHA-256: 603da481bd8876a89f7d4a57854508db344328af301d7b9fef3475d0ef8d5d30

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