Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9962ad05342e319…

MALICIOUS

PDF

78.0 KB Created: 2021-04-06 23:35:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 541db41702ee9169b7fd267e3ee46863 SHA-1: d2bf097542eb9120a48097b7ba4d39e0a0c92ef1 SHA-256: d9962ad05342e31997d3edc54e503cf70159800270bd03eb08ef4bb9d1998ad3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9996

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 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://crophysi.ru/123?utm_term=evaluation+performance+report+examples PDF link annotation
    • http://resipowepo.getenjoyment.net/maxotakedubopinebuw.pdfIn PDF document text
    • http://fekosuse.getenjoyment.net/vineland_3_manual.pdfIn PDF document text
    • http://tuxesimufimiti.mypressonline.com/saxuzofusufodotizuruk.pdfIn PDF document text
    • https://sifameduj.weebly.com/uploads/1/3/4/5/134522790/nitakukilubit.pdfIn PDF document text
    • https://gaxasexafarud.weebly.com/uploads/1/3/4/5/134590452/7924130.pdfIn PDF document text
    • http://tuwukadinem.mygamesonline.org/best_photoshop_tutorials_youtube.pdfIn PDF document text
    • https://dekizojumuleje.weebly.com/uploads/1/3/4/1/134133140/vaxufovov-xuwomosufer-fedonadel-rezedu.pdfIn PDF document text
    • http://lalikexitaxixix.getenjoyment.net/aicte_handbook_2020_20.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411270/normal_5ffd77240e36f.pdfIn PDF document text
    • https://xazepobuzu.weebly.com/uploads/1/3/4/5/134582826/52e6a426c2aa48.pdfIn PDF document text
    • http://gisoboxizaza.mygamesonline.org/dorothy_must_die_series_danielle_paige.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492257/normal_6067e0759d91e.pdfIn PDF document text
    • https://vebipebetas.weebly.com/uploads/1/3/4/0/134012388/52b37fc50be4.pdfIn PDF document text
    • https://binapesod.weebly.com/uploads/1/3/1/4/131438069/zawixivevudeb-bafexa-xisix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379720/normal_601a2f57d69c6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b628c19-f20b-4f43-8781-cf63e84e3dd6/30573740833.pdfIn PDF document text
    • http://suwuriru.onlinewebshop.net/what_does_the_yellow_dot_mean_on_snapchat_next_to_my_story.pdfIn PDF document text
    • http://benamow.myartsonline.com/sindrome_de_asperger_en_la_adolescencia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/557f4a4e-c4a2-4967-bded-dcc60c160f0f/33260549116.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b147d10f-b5ad-4af0-9459-e4330e742713/61068997766.pdfIn PDF document text
    • http://xobeminal.atwebpages.com/como_traducir_de_aleman_a_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b417a5f-b47e-4c57-bc55-02c9fb538855/bewonugaxetapuw.pdfIn 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_off0000f48b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48B 5248 bytes
SHA-256: f3bfc2a27e63e462c85788d6acb802a92de3e8887e889bbe7309b97350d3b3e8
font_01_sfnt_off0001065f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1065F 10680 bytes
SHA-256: 945f79ca3152631327330f5098da880c2f7445cc2bfc3dc0e3046d386ca799c3

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