Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fef24ae1fb815cf…

MALICIOUS

PDF

72.7 KB Created: 2021-03-21 21:48:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 2e94e8252423c3cde5c6bc1a8f2f729a SHA-1: 9c77f3a067fae4d9db5a6403e660af51da67646c SHA-256: 8fef24ae1fb815cf0589f150f914a3bb113520fbd5184af8453ed8f68c7ac0f2
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized, suggesting a link farm or phishing lure. The heuristic 'PDF_SEO_LINK_FARM' specifically indicates a mass of external PDF links, with one prominent example being http://powejuzusar.epizy.com/womokawukebi.pdf. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://nipisod.ru/award?keyword=native+american+word+search+pdf PDF link annotation
    • https://tedisizizifem.weebly.com/uploads/1/3/4/2/134235801/veberolinebu.pdfIn PDF document text
    • http://mivetys.xyz/cedula_de_identificacion_fiscal_sin_contrasea5vsgl.pdfIn PDF document text
    • http://chambrely.xyz/audio_amplifier_circuit_diagram_usinmrtol.pdfIn PDF document text
    • http://community-day.ru/bio_poem_template8aumb.pdfIn PDF document text
    • https://wulafuxuzezam.weebly.com/uploads/1/3/2/3/132302924/xixaxug.pdfIn PDF document text
    • http://infonewstravel.com/riviputapaximuemke7.pdfIn PDF document text
    • http://repair-planshetov.ru/how_to_buy_tccl_set_top_box8vduc.pdfIn PDF document text
    • https://xoxomupufolud.weebly.com/uploads/1/3/0/9/130969418/riwawi_patofifa_wiredoxerov_mofiv.pdfIn PDF document text
    • https://mawubuzepegi.weebly.com/uploads/1/3/3/9/133989242/xewenameroto-vipawutexo-nizopeg-vegijaberikezop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://powejuzusar.epizy.com/womokawukebi.pdfIn PDF document text
    • http://goduziposu.rf.gd/how_to_apply_for_pa_snap_benefits.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/google_sheets_sumif_cell_is_blank.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/what_is_child_centered_approach_important.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/289e202d-7826-499f-a2df-af13bf156b08/64769372313.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/4804771820.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/pezewuxekupumijupap.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/19968929641.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/66019223982.pdfIn PDF document text
    • http://jubadoloje.epizy.com/65411882277.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/archicad_lamps_library.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/13636522701.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/formal_clothing_online_shopping.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b80fb8f-7523-4287-8c39-ce2acc288dcb/pharmacy_sig_codes_cheat_sheet.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_off0000dec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC2 5484 bytes
SHA-256: 8307046338415d6b5169301e94eb68ba6bef738456592a810e651f53ee37bec5
font_01_sfnt_off0000f15c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF15C 10688 bytes
SHA-256: 348371c16a8bdaae5f6ccece4a8d623d4d14c25b97131522fd7d22168c68e9d6

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