Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c899d7a497317c5…

MALICIOUS

PDF

74.6 KB Created: 2021-03-09 15:42:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 113c3e81335813208738be2c0f72174d SHA-1: e9f05155b3ac2ec10f74e5a6a04dcd0add958713 SHA-256: 0c899d7a497317c547ff413b58dea6f3a7f3e4156603c3e5484ae137d88aa3cb
260 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document contains numerous links, many pointing to disposable hosting and redirector infrastructure, indicating a link farm designed to distribute malicious content. The presence of urgency and invoice lures further supports a phishing or scamming intent. While no scripts were directly extracted, the PDF structure and embedded links strongly suggest it's designed to exploit users by directing them to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=professional+painting+quote+templates In PDF document text
    • https://cdn.sqhk.co/dikapagoloza/aheC8hf/duetto_spider_osso_di_seppia.pdfIn PDF document text
    • https://cdn.sqhk.co/kekelivig/hOqiisG/do_two_points_always_determine_a_line.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476768/normal_5fe7a9deae759.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427504/normal_5fc60673d234a.pdfIn PDF document text
    • http://falorilipeb.mywebcommunity.org/89716963210.pdfIn PDF document text
    • http://rutonujak.iblogger.org/jasper_report_chart_documentation.pdfIn PDF document text
    • https://cdn.sqhk.co/novupezezis/rdhciaS/76455714750.pdfIn PDF document text
    • https://cdn.sqhk.co/zirigajer/uUgeBKH/hungry_shark_evolution_kraken_trailer.pdfIn PDF document text
    • http://azorocheat6.xyz/20725317191bvcke.pdfIn PDF document text
    • http://topfrag.rip/polaladiffwhe.pdfIn PDF document text
    • http://spain50off.info/kenmore_elite_he3_gas_dryer_not_heatinghji0r.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xevazuguvapuj.rf.gd/70123581227.pdfIn PDF document text
    • https://06ebba1c-c738-45d4-b58d-83edbdcc9420.filesusr.com/ugd/b14caa_03752de788794d1086691fff392bc600.pdf?index=trueIn PDF document text
    • http://zisukuvi.atwebpages.com/how_to_cancel_adobe.pdfIn PDF document text
    • https://84d5b3ab-51dd-4312-87b7-51df18fb3b26.filesusr.com/ugd/9ea9b6_83449183ca6a4269aead1783033c867a.pdf?index=trueIn PDF document text
    • https://393102e6-89af-4738-8cad-89662dba8dc5.filesusr.com/ugd/33a16d_a06caff9e09240e89f3553db38856b99.pdf?index=trueIn 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_off0000e79b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79B 5348 bytes
SHA-256: 88a095d8712b83a5ba77716233984cc713b60ccff3a3222d3704195b8159de55
font_01_sfnt_off0000f9b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B5 10380 bytes
SHA-256: c4243f8ad19d90517f336a61d762196ac943aba75e0e2198ecde27a37399bfd9