Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd23b214e5065088…

MALICIOUS

PDF

77.4 KB Created: 2021-04-10 13:24:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 8a61f639abe7481a627d2bd82b30533e SHA-1: 1548ca49bce28876d734a4709e722e50f9c7af96 SHA-256: dd23b214e5065088e72960906541f49518a3efda08ec8ba46971358664550d3b
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/strik?utm_term=how+much+sugar+is+in+subway+bread PDF link annotation
    • http://idealica-itufficiale.website/lugalalafafikitodorodlw45.pdfIn PDF document text
    • http://aycotoro7.xyz/45355094396cbo7c.pdfIn PDF document text
    • https://juwufugoxeza.weebly.com/uploads/1/3/4/5/134528381/bawagedifi_fowodunatan.pdfIn PDF document text
    • https://cdn.sqhk.co/kewixoretuze/gdhaOoP/95259070644.pdfIn PDF document text
    • https://nidiladidubupa.weebly.com/uploads/1/3/4/7/134753920/2190696.pdfIn PDF document text
    • https://cdn.sqhk.co/rekubapapup/hugj5gg/44772460215.pdfIn PDF document text
    • http://blekrossi.ru/gapumojibifakenurubujugw03v6.pdfIn PDF document text
    • https://cdn.sqhk.co/botonerepap/hbSFyXj/ruzopuputexi.pdfIn PDF document text
    • https://lenagalazipanom.weebly.com/uploads/1/3/5/3/135310064/2613408.pdfIn PDF document text
    • https://cdn.sqhk.co/xurajalijok/ijdwcie/lamano.pdfIn PDF document text
    • https://cdn.sqhk.co/moxulofilose/fZ5vnZK/3423039368.pdfIn PDF document text
    • http://vashastrahovka24.ru/warcraft_lord_of_the_clans_game_download2kicr.pdfIn PDF document text
    • https://cdn.sqhk.co/vuvupewog/Djagpjg/30044066077.pdfIn PDF document text
    • http://autocredit.moscow/japopilinogivibezejm1l1g.pdfIn PDF document text
    • https://cdn.sqhk.co/rutunidosaw/jiifgf8/capsaicin_cream_for_diabetic_nerve_pain.pdfIn PDF document text
    • https://jarurozo.weebly.com/uploads/1/3/5/3/135320013/6977591.pdfIn PDF document text
    • http://lunesygets.xyz/critical_thinking_movie_rating_pgxu1ng.pdfIn PDF document text
    • http://modernstyle.pro/fasttrack_guitar_method_book_1cp7oz.pdfIn PDF document text
    • http://latencfsrt.space/111654881872jskl.pdfIn PDF document text
    • http://help-verification.com/how_to_establish_sales_goalsj0tqe.pdfIn PDF document text
    • https://cdn.sqhk.co/rebibenizuj/hijit22/vamavixodajabiw.pdfIn PDF document text
    • https://petugaxuw.weebly.com/uploads/1/3/5/3/135397026/209730f806b6d9.pdfIn PDF document text
    • http://afracheat7.xyz/probability_worksheet_grade_57824s.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ef4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF4F 5616 bytes
SHA-256: 2cab607187ef05b3e9e1576f93428f9a735d4eed5878f16c568c106675345045
font_01_sfnt_off00010252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10252 11212 bytes
SHA-256: cd9b5777a6738f0e7bbe890862d901e12eb5005de4f27ac447a3b1a23bbb0054

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