Malicious PDF — malware analysis report

Static analysis result for SHA-256 e22cb8ea845bf170…

MALICIOUS

PDF

79.1 KB Created: 2021-03-08 15:39:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: d27970ecac2c5377428d9bb23c8ac2e8 SHA-1: b4dd56309d885f822ad6e35195334095e500bb42 SHA-256: e22cb8ea845bf1709be797dd120cb92684cc484a440adf49964ad6a5eba02a7c
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm and a phishing attempt. It contains numerous external links, many hosted on disposable domains, designed to redirect users to potentially malicious content. The ML classifier and ClamAV also strongly indicate maliciousness, specifically a phishing or trojan payload.

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://resalured.ru/wix?keyword=reactions+of+alkenes+and+alkynes+worksheet+with+answers PDF link annotation
    • https://cdn.sqhk.co/reparepoki/AchhLzV/dedodisubupapaniba.pdfIn PDF document text
    • https://xapitutas.weebly.com/uploads/1/3/0/8/130813648/e2f4e273182.pdfIn PDF document text
    • https://vunorozixu.weebly.com/uploads/1/3/1/1/131163876/fefotoz.pdfIn PDF document text
    • https://cdn.sqhk.co/botuvawezej/gcYTich/wamolunuxu.pdfIn PDF document text
    • https://wisiwojapano.weebly.com/uploads/1/3/4/8/134896472/vorat.pdfIn PDF document text
    • https://duxojavuse.weebly.com/uploads/1/3/1/4/131483254/5a36a033bd.pdfIn PDF document text
    • http://megarafulosibef.22web.org/47328238210.pdfIn PDF document text
    • https://xunowarusaki.weebly.com/uploads/1/3/4/3/134371630/weliniwiwulik_fobeputexovipow_gafunisajibo.pdfIn PDF document text
    • https://cdn.sqhk.co/bexoninodag/ifaihib/70107859037.pdfIn PDF document text
    • https://cdn.sqhk.co/bosamame/ijvPhdq/business_management_books_to_read.pdfIn PDF document text
    • https://cdn.sqhk.co/waxipefimafa/bXhfjjh/wow_special_character_name_generator.pdfIn PDF document text
    • https://kilavolofijon.weebly.com/uploads/1/3/1/1/131164174/botosawakizok_tegagosusejasop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a68e2ff5-bf17-48e3-82d4-ceb975b85758.filesusr.com/ugd/760101_682281a1f40645e3b8ce95dff865a674.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jawusawar/wejul.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/debut_invitation_card_design_template.pdfIn PDF document text
    • https://s3.amazonaws.com/zubata/kodiwojixulatipoj.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/bouvier_law_dictionary.pdfIn PDF document text
    • https://45e41439-46a4-4c97-84f0-155cfeda4cef.filesusr.com/ugd/9d7ad9_ee67a45c37bd4b81a1d0a5b6da1d5cb2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fasudikek/pizugigaxekegatazigiv.pdfIn PDF document text
    • https://e50eee24-2d95-422d-8083-6f618d95927b.filesusr.com/ugd/594ae5_5e8e8fe355c44afd96e453cf19ff3833.pdf?index=trueIn PDF document text
    • http://moxurux.epizy.com/pupode.pdfIn PDF document text
    • https://b2f3f1fb-4f3f-4d5d-be65-f5b10dce6288.filesusr.com/ugd/735189_9690d27bd3cb42abbe86a7da0fbd43a2.pdf?index=trueIn 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_off0000f8cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CC 5372 bytes
SHA-256: a5aafaada3c8a1510315d0ff004df3320e15999618290414e3a9c0d1aed45228
font_01_sfnt_off00010b2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B2B 10440 bytes
SHA-256: 527f326bb29aef4c8d169f3f33f998895154be0937edf758e362cdf16443d2a4