Malicious PDF — malware analysis report

Static analysis result for SHA-256 615200eced6b9df2…

MALICIOUS

PDF

68.5 KB Created: 2021-02-24 09:49:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9c4b745371a4ee6ab145c1d7bd73ca04 SHA-1: 41c79570e231298623fad892e5f007a9d3ba8b24 SHA-256: 615200eced6b9df2698917bbe6ad16a6eddb0480dfc4a27094f4469debd1822c
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting it functions as a link farm for SEO manipulation or to distribute further malicious content. The presence of external URIs and the overall structure strongly suggest it is designed to redirect users to potentially harmful websites.

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
  • 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://seumenha.ru/wb?keyword=charles%20shirley%20jackson%20analysis PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420776/normal_601bc1e19b432.pdfIn PDF document text
    • https://jakugogafezokev.weebly.com/uploads/1/3/1/4/131437362/27cf39a0ff3.pdfIn PDF document text
    • https://cdn.sqhk.co/litigoruf/jiePDgh/pang_adventures_switch_fisico.pdfIn PDF document text
    • https://dojilosadokadog.weebly.com/uploads/1/3/4/8/134890500/namimunelufoxulemoki.pdfIn PDF document text
    • https://cdn.sqhk.co/bilexodofose/b8tRs5Z/poughkeepsie_weather_saturday.pdfIn PDF document text
    • https://cdn.sqhk.co/rovifatira/cFjafhg/komumovipomosoni.pdfIn PDF document text
    • https://cdn.sqhk.co/linidivez/jahf7jb/65630883467.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445324/normal_60281bdd2c7b7.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/mifMlia/bubble_gum_simulator_codes_october_2020.pdfIn PDF document text
    • https://nilijinaxobizag.weebly.com/uploads/1/3/4/3/134356504/d559fc9a803d0dd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416923/normal_6003b19561dfa.pdfIn PDF document text
    • https://xesukalo.weebly.com/uploads/1/3/5/3/135311970/rafolunogon.pdfIn PDF document text
    • https://zadopelujon.weebly.com/uploads/1/3/4/8/134884154/rutipar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451033/normal_5fe92976f0fcb.pdfIn PDF document text
    • https://dudunetexuzo.weebly.com/uploads/1/3/1/3/131379759/pururaf_fefonowufaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jibogifimot.epizy.com/new_gems_english_reader_class_6_answers.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_off0000d0d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0D1 5036 bytes
SHA-256: c0318ff2ae62eed90d2cd8f6f70af988dc27770da5ddf5fac65bc145cf9b1d26
font_01_sfnt_off0000e1f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F1 10284 bytes
SHA-256: 457c822b62384ef0ae21b8c0cbd25214d7a2d7a6b5c1d269307a5e3eead98981

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