Malicious PDF — malware analysis report

Static analysis result for SHA-256 85b15fa1de40f5b9…

MALICIOUS

PDF

75.7 KB Created: 2021-02-02 15:40:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 476f6ff5cae9c463d58347740cdb2b34 SHA-1: e022b2b7676e309a8273b4e1b82ae866d78619ff SHA-256: 85b15fa1de40f5b96d0161630fb8d39f1a0493f292252f682812dd6bffed4fd4
244 Risk Score

Malware Insights

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

This PDF file is classified as malicious and contains numerous embedded links, many of which point to disposable hosting and redirector infrastructure. The document body, though obfuscated, suggests a lure related to 'play games unblocked online'. The primary attack pattern involves redirecting users to malicious sites, likely for phishing or malware distribution, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://yafferge.ru/123?utm_term=play+games+unblocked+online In PDF document text
    • https://wisenuru.weebly.com/uploads/1/3/1/8/131856959/vakavipa_demuzemob_gutowukutox.pdfIn PDF document text
    • https://cdn.sqhk.co/tajavujexiz/8yiKgee/defender_hd_1080p_4ch_with_4_bullet_cameras.pdfIn PDF document text
    • https://runidodejifam.weebly.com/uploads/1/3/4/0/134040950/1c99c2e1ce5c7e.pdfIn PDF document text
    • http://servicesforsupport.com/lemopamescr.pdfIn PDF document text
    • https://ruwatija.weebly.com/uploads/1/3/4/8/134846771/resariminisaxo-losoteteju-pedolax-pukazevulerijo.pdfIn PDF document text
    • https://giwemonuxir.weebly.com/uploads/1/3/0/7/130775654/dulefeza.pdfIn PDF document text
    • https://cdn.sqhk.co/bofagenined/Hthjgge/exploration_park_las_vegas_nevada.pdfIn PDF document text
    • https://cdn.sqhk.co/lijipatalenu/jjBUtIY/outliner_pens_nz.pdfIn PDF document text
    • http://everydays.space/audiology_infection_control_plan_templateh50ru.pdfIn PDF document text
    • http://fruittea.space/33853520688emlfu.pdfIn PDF document text
    • https://vefiwuzozubeki.weebly.com/uploads/1/3/0/9/130969791/8547254.pdfIn PDF document text
    • https://pememeva.weebly.com/uploads/1/3/0/8/130874233/7ef9841.pdfIn PDF document text
    • https://rumodabumuxe.weebly.com/uploads/1/3/1/8/131857513/5b4746c15ea35f1.pdfIn PDF document text
    • http://detonic-romania.website/900423235239iw8g.pdfIn PDF document text
    • https://vikabedegopeve.weebly.com/uploads/1/3/0/8/130874339/fa2d2256.pdfIn PDF document text
    • https://jukatuve.weebly.com/uploads/1/3/2/7/132741058/e1295f9979e2.pdfIn PDF document text
    • https://vamotavobepud.weebly.com/uploads/1/3/1/4/131438348/zagojoda.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000eb2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2F 5472 bytes
SHA-256: 462ecc4a55ace1ddb560c738876662b1e34ca7ab446d3cd39d1f298932362749
font_01_sfnt_off0000fdca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCA 10476 bytes
SHA-256: 75d0474cc1b2b51fbca97628af99f30e206e56f1a90fdf2805ed36780aa484ce

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