Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dd8fb5f87f39f1f…

MALICIOUS

PDF

90.7 KB Created: 2021-05-29 23:03:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 795c212f3b65bcfb6e85b2fafb7699d8 SHA-1: e1bb91ca014b32f60a7ab69eabead42e4635b069 SHA-256: 2dd8fb5f87f39f1fbac50e4c8e88775011b178e6af4f8e910dec44643b414942
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure for free media downloads, which is a common tactic for distributing malware or conducting phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://ponafet.ru/strik?utm_term=ultimate+spider+man+full+episodes+in+hindi+free+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4464865/normal_5ffa21c93b213.pdfIn PDF document text
    • https://rujogapojepon.weebly.com/uploads/1/3/4/5/134597846/4492723.pdfIn PDF document text
    • https://loxutagunepolu.weebly.com/uploads/1/3/4/7/134763456/5948513.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480580/normal_6047105f77585.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473892/normal_6032bfb39683e.pdfIn PDF document text
    • https://xumolatakikekum.weebly.com/uploads/1/3/4/3/134335049/xuxumiparitafod-fudub-vorumef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481663/normal_60021cc6ceccf.pdfIn PDF document text
    • https://sijerixo.weebly.com/uploads/1/3/4/0/134042725/vajuxavokori.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445726/normal_5fc945bc0d73f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476437/normal_5ff140e8c9811.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369512/normal_60412ec9a041e.pdfIn PDF document text
    • https://zobupevebidibet.weebly.com/uploads/1/3/3/9/133997179/1375257.pdfIn PDF document text
    • https://raxuzorufureraw.weebly.com/uploads/1/3/0/7/130775378/jufefetebobuwavuse.pdfIn PDF document text
    • https://lefakapuwowe.weebly.com/uploads/1/3/4/3/134353253/wosabi.pdfIn PDF document text
    • https://dexatasudawuge.weebly.com/uploads/1/3/4/4/134477966/2961898.pdfIn PDF document text
    • https://vigodozoxofi.weebly.com/uploads/1/3/4/5/134599787/7228566.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/e77b2bad-84e2-4702-8933-8c13709568f0/nezojireninuxonibaxuju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f5981f4-db6b-4154-8a89-38c7d4fffe3a/does_thinkorswim_have_renko_charts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f44b6fe-0413-4ee8-b69d-abe30ce810c2/jon_snow_x_reader_pregnant.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d6cc5b1-9f41-4c93-af66-b707cdb73baa/descargar_biblia_textual_4ta_edicion_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61d6d974-3aee-4dd6-b25d-3d3eb38a242e/lenovo_t420s_ram_specs.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_off00012748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12748 5364 bytes
SHA-256: b8ad408e017afc83904a8904edf14c69471a41d382176f26310bbd0957e364fb
font_01_sfnt_off00013969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13969 10436 bytes
SHA-256: ca0b2d243e29037b11bd4ee68acbdfc13c5483880b8560826dc14e4dc7d4882a