Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddfaad6183f32b7a…

MALICIOUS

PDF

65.9 KB Created: 2021-03-01 02:23:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c736db7122fea06cb165aab2f8377440 SHA-1: 78972e4bea2f599481854c2a29b92a0abbfcada2 SHA-256: ddfaad6183f32b7a64e6e532decc28c2ffc6daacbcdb26b68c69e1346316648e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable or unknown-reputation domains, suggesting a link farm or phishing lure. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic and the presence of multiple external URIs strongly indicate malicious intent. The ML classifier and ClamAV detection further confirm the malicious nature of the file, likely serving as a dropper or phishing document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/wb?keyword=vicks%20vapor%20humidifier%20cvs PDF link annotation
    • http://sdfsdfsdf.shaketorch.com/kokuzagenem.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488570/normal_5ff9d469ca274.pdfIn PDF document text
    • http://topcreditscore.info/the_wheel_of_time_tv_series_release_datep3zs7.pdfIn PDF document text
    • http://groshyk.site/javascript_and_jquery_jon_duckettlt4r7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490370/normal_5fd3d23129d20.pdfIn PDF document text
    • http://streamsweets.com/hyperbolic_derivatives_worksheetce8ky.pdfIn PDF document text
    • http://fukuzowi.sportsontheweb.net/schaums_outline_mathematical_economics.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492286/normal_601dd9e29d902.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420449/normal_6033bfe1ad8e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381988/normal_5fe87e542de90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494875/normal_603b3ee32bea6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458839/normal_6034d38b98b96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500668/normal_60360412325e8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jebowozuguvufot.rf.gd/pobuwadupiroz.pdfIn PDF document text
    • http://jemileti.atwebpages.com/13298882519.pdfIn PDF document text
    • http://finesegugumemo.epizy.com/emulateur_android_sur_pc_nox.pdfIn PDF document text
    • http://wenares.myartsonline.com/pixepururakogow.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/lagevoziv.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/kamuririsewuvuvifaduvuduw.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/dosux.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_off0000c41c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC41C 5452 bytes
SHA-256: d133e2a8c6aa758de931f2eb0d364bb78671bead717194089bb0342fa0ebfc47
font_01_sfnt_off0000d68e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD68E 10200 bytes
SHA-256: 6e10408468289f55eb1360e0454ba511ca6de6ea669896f51bc2451b1b916d95

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