Malicious PDF — malware analysis report

Static analysis result for SHA-256 026645b51ee6c88e…

MALICIOUS

PDF

68.6 KB Created: 2020-12-26 19:43:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 416621a7db4583e9d1dab2ee89988eff SHA-1: 7e294d0dbfc30723491e946e3de4560d96ff3b62 SHA-256: 026645b51ee6c88e1d546c6b6e94c392e655c27b4b8a194532d9e0699159514f
252 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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
  • 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://trafffi.ru/aws?utm_term=b+v+rao+world+history+pdf+free In PDF document text
    • https://static.s123-cdn-static.com/uploads/4488809/normal_5fe1d262ba7f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492573/normal_5fd6dd031560f.pdfIn PDF document text
    • https://xuxukiworizep.weebly.com/uploads/1/3/4/7/134723333/wojuvopimumosuvopo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383680/normal_5f9a7317de24e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370055/normal_5fd77a34f3af5.pdfIn PDF document text
    • https://pagurewitapusak.weebly.com/uploads/1/3/4/6/134632053/beduguz.pdfIn PDF document text
    • https://zenerabu.weebly.com/uploads/1/3/4/8/134870876/wotedulapadi-wogatifa-taxojakomugov-nawuvetodubo.pdfIn PDF document text
    • https://gudagomafefaxer.weebly.com/uploads/1/3/4/5/134523608/6074396.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409616/normal_5fc066f143dc2.pdfIn PDF document text
    • https://dubitofux.weebly.com/uploads/1/3/4/4/134458445/233973.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4be0c07c-ebb3-41cc-84c9-d066660ebdaf/grow_guide_download_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/ankhiyon_ke_jharokhon_se_movies_song.pdfIn PDF document text
    • https://s3.amazonaws.com/juvosi/13915960789.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2668bffd-27ef-4470-b0aa-f350ae342f5e/gsmarena_iphone_11_pro_vs_iphone_xs.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/maxusokotisolezuda.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_off0000d079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD079 5432 bytes
SHA-256: 917b323321099d05d564a6d5da96106e884e5914f612ca777d631519a16452ab
font_01_sfnt_off0000e308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE308 10124 bytes
SHA-256: 375279b68f9faa463d62d97aace5c00f31d1e93b39f517066bcc4b9386581130