Malicious PDF — malware analysis report

Static analysis result for SHA-256 df88e1596871b9e6…

MALICIOUS

PDF

74.8 KB Created: 2021-03-19 19:39:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 83de8b908c3568fb9f18b42c40f7ef1d SHA-1: 59e81fe2efb0ad5ad10975d97f780705af6d3b59 SHA-256: df88e1596871b9e6ebde95e5ee40ad13731d4205093009b164562f4123fd9c24
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting and configured as a link farm, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains metadata related to PDF generation, suggesting it's a crafted document rather than a legitimate one.

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://resalured.ru/123?utm_term=the+comprehensible+classroom+answers PDF link annotation
    • http://megalit-korolev.ru/binewajagudojifawesivenmrvil.pdfIn PDF document text
    • http://new-leggins.site/guest_services_job_description_topgolfoa8vx.pdfIn PDF document text
    • https://fafetomipisiso.weebly.com/uploads/1/3/4/6/134603542/8a9a3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486971/normal_601edf86d3a31.pdfIn PDF document text
    • https://nibolujadi.weebly.com/uploads/1/3/1/3/131381302/aa340a910.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452609/normal_5febce2f94895.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448536/normal_604d7e847a625.pdfIn PDF document text
    • https://mafenipo.weebly.com/uploads/1/3/4/8/134879688/5759940.pdfIn PDF document text
    • http://xugaguf.mypressonline.com/99990194122.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368732/normal_6010dde80fd4d.pdfIn PDF document text
    • https://gidibaxatum.weebly.com/uploads/1/3/4/8/134889182/sesitir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421352/normal_5fe7ca2d1606d.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/jebokizez/xavubunifinufuzu.pdfIn PDF document text
    • http://pimobepetokonud.myartsonline.com/10495217077.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f12aa146-f987-4503-a7fb-98c349fdd80b/red_queen_victoria_aveyard_age_rating.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/782e499a-de7a-4a58-9cf4-a02f982185a0/riwunofabuwozofupimep.pdfIn PDF document text
    • http://lojabupabavize.onlinewebshop.net/how_to_lose_belly_fat_indian_diet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47170eb5-11bc-47a2-9821-ee0823089a18/selekiremujakebosep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b93dd637-b848-40fb-a309-60aa7780479b/mupinojumugofib.pdfIn PDF document text
    • http://palelezugob.onlinewebshop.net/matlab_subplot_border_tight.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/sikotowidawuvonurugu.pdfIn PDF document text
    • http://matewedidoxeber.onlinewebshop.net/lg_g_vista_2_battery_replacement.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_off0000e5df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DF 5356 bytes
SHA-256: cf1a8ac9086df87c896b56fea672c0e32ec254ed85717325e034e917edb2b11a
font_01_sfnt_off0000f7f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F4 11332 bytes
SHA-256: 0a3acd63a6e37c3ee299b9c8c539d3e89f59b20bea74b7e6d394708cd8b237a7

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