Malicious PDF — malware analysis report

Static analysis result for SHA-256 5822a43592cec1fe…

MALICIOUS

PDF

64.7 KB Created: 2021-02-22 06:52:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 8b09d124d4592a1b72b69d3b3a6ca6c7 SHA-1: cd9d31ae89ad6c636c022e4ce1ec034be6a5ad38 SHA-256: 5822a43592cec1fe51a08db5db174a2ac09bd6229c43040e5d0597c1f21709b3
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous embedded URLs, with at least one identified as a known malicious redirector. The primary purpose appears to be directing users to external sites, likely for phishing or to download further malicious content. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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
  • 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 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=why+mosquitoes+buzz+in+people%2527s+ears+pdf+download In PDF document text
    • http://brumbum2.xyz/85927365789hes85.pdfIn PDF document text
    • https://cdn.sqhk.co/girolivudafo/eAkWicz/gagiverib.pdfIn PDF document text
    • https://cdn.sqhk.co/kixagixupo/PHeTSjf/gugurazesep.pdfIn PDF document text
    • https://cdn.sqhk.co/xejudawadoni/gQschj7/31691708866.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370542/normal_601cbc7144a5b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366625/normal_5fcdc28d935b1.pdfIn PDF document text
    • http://potenciy.xyz/dikisodivuwejaxedoxatuwazlgoof.pdfIn PDF document text
    • http://mawidoxejonej.iblogger.org/bandicam_full_crack_32_bit.pdfIn PDF document text
    • https://cdn.sqhk.co/lewiwifo/uThehdV/stupid_zombies_exterminator_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zukeligo.rf.gd/zafumivulabebe.pdfIn PDF document text
    • http://jegegapi.rf.gd/41855089363.pdfIn PDF document text
    • http://pasexojubil.epizy.com/que_tamao_tiene_una_foto_carnet_en_pixeles.pdfIn PDF document text
    • http://povusesa.rf.gd/govesazowagijuxelamod.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bda0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDA0 5836 bytes
SHA-256: ee458f797637f739c7367d2bdd4f2ee73bf01ebec3c4d6f22c46ac9652c60339
font_01_sfnt_off0000d178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD178 10636 bytes
SHA-256: d0354a75824ac0013099be8909f373156b3dc2bd8458eed97c0cdd92b7a48620

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