Malicious PDF — malware analysis report

Static analysis result for SHA-256 dae342465a1ec5dd…

MALICIOUS

PDF

77.5 KB Created: 2021-02-12 19:41:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c3707c3224b458ef10e105c0718313e5 SHA-1: e4b6310834e22934638ee638c56da6432404a029 SHA-256: dae342465a1ec5ddb8335a6ca84932bb1729f868f09ca01fc90548d83f6b61e9
226 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a significant number identified as part of a link farm designed to manipulate search engine results or direct users to malicious content. Several heuristics indicate the presence of invisible links leading to CAPTCHA-themed lures, suggesting a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent, likely to redirect users to potentially harmful websites.

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
  • 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.
  • Invisible PDF links to CAPTCHA-themed web lure high PDF_CAPTCHA_LINK_LURE
    PDF contains invisible clickable link annotations that point to a CAPTCHA/capcha-themed web path. This is a common phishing and ClickFix-style routing pattern: the PDF itself is inert, while the linked page performs the credential prompt or fake verification.
  • 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://druttle.ru/wix?keyword=dnd+5e+gold+piece+weight PDF link annotation
    • http://czecheducation.space/audio_record_from_messengeri4l92.pdfIn PDF document text
    • https://nekusudowup.weebly.com/uploads/1/3/5/3/135315851/2427018.pdfIn PDF document text
    • https://cdn.sqhk.co/duwokarewesu/hRpXjbt/pozodesadopesu.pdfIn PDF document text
    • https://nizevamil.weebly.com/uploads/1/3/2/8/132814567/tivexi.pdfIn PDF document text
    • http://nout-prodat.site/altar_of_siena_b1f_guide_cabal_wikiw06s9.pdfIn PDF document text
    • https://zixokamewi.weebly.com/uploads/1/3/4/3/134386319/fivobaza.pdfIn PDF document text
    • https://kitivagep.weebly.com/uploads/1/3/0/7/130775950/nabaledimo.pdfIn PDF document text
    • https://cdn.sqhk.co/nodewanase/jbhdHic/84442358591.pdfIn PDF document text
    • https://cdn.sqhk.co/nolovojawek/ji5d8jc/nadosimizobodi.pdfIn PDF document text
    • https://cdn.sqhk.co/gagowuname/dgghc9T/block_story_download_free_android.pdfIn PDF document text
    • https://cdn.sqhk.co/vaminika/i0Ohdih/lawn_tractor_into_go_kart.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gavobawum/rational_expressions_worksheets_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/40565082075.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/anti_captcha_chrome_android.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/20857685760.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_off0000f285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF285 5068 bytes
SHA-256: f47ce25e62e5ec635c5a863998829637818bd0f957a570c40ae2d4982c8c6e3c
font_01_sfnt_off000103e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E0 10944 bytes
SHA-256: 7c6c913052ddb910acd560ee6207411b84bb2bc37579648531a0cc4f138e678d

Open this report in the interactive analyzer, or submit your own file for analysis.