Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaa247f81773d215…

MALICIOUS

PDF

79.7 KB Created: 2021-03-25 05:02:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: bdb10a74ad6d64e485ae13b50d5d391f SHA-1: d55110504b94aab33d4f99c3ca8fca1aab173329 SHA-256: eaa247f81773d215de879f5c6a5f845b17e317560c73a66d40c8f73f27b315fb
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 a link farm or SEO spam operation. The embedded URLs, such as 'https://midufefew.ru/wix?keyword=que+significa+nba+en+siglas', are likely used to redirect users to malicious content or phishing sites. No scripts were extracted, but the PDF structure and numerous external links point towards a content-luring attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://midufefew.ru/wix?keyword=que+significa+nba+en+siglas PDF link annotation
    • https://lufasewobomitod.weebly.com/uploads/1/3/4/7/134730449/fobujetuwofuzufan.pdfIn PDF document text
    • http://xomofaki.getenjoyment.net/xebuzelerezavunikawap.pdfIn PDF document text
    • https://dopijixofovaje.weebly.com/uploads/1/3/4/6/134692352/sosapitekoko.pdfIn PDF document text
    • https://nutukotixirijir.weebly.com/uploads/1/3/5/3/135392142/dokavivofi-perit-xugunobo.pdfIn PDF document text
    • http://miwuzobi.sportsontheweb.net/88989442789.pdfIn PDF document text
    • http://sepoxudozixo.sportsontheweb.net/yamaha_av_receiver_htr-5740.pdfIn PDF document text
    • http://usblighter24.site/new_holland_7308_loader_attachmentt7f3k.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/pghGSjb/17273123680.pdfIn PDF document text
    • https://kedetasogo.weebly.com/uploads/1/3/4/5/134599644/f1077eda5488a87.pdfIn PDF document text
    • https://cdn.sqhk.co/mesodimeduje/hiegeid/regulation_of_cholesterol_biosynthesis.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvaratuji/ji77ief/gejikusosekibiguzanab.pdfIn PDF document text
    • https://cdn.sqhk.co/fuluzagile/XjBhaZe/bududawaxasilew.pdfIn PDF document text
    • https://cdn.sqhk.co/libigekukaru/g1ahjih/bokizudizo.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwadezab/hjWphfM/37622210371.pdfIn PDF document text
    • https://cdn.sqhk.co/zubavagi/Bgciiji/pofamemuveli.pdfIn PDF document text
    • http://lumacy.site/ssb_screening_testglxzb.pdfIn PDF document text
    • http://rrrrkkkkk.space/jodi_picoult_the_pactw0an7.pdfIn PDF document text
    • https://cdn.sqhk.co/xeveweno/tljfifs/51418937324.pdfIn PDF document text
    • https://cdn.sqhk.co/bulixanejad/ePjbwia/full_steam_espresso.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://e5aadbcf-511f-4ee2-989a-4410a22eeed0.filesusr.com/ugd/64930c_72fde1ae1e674ac288bc705b0f1e14c3.pdf?index=trueIn PDF document text
    • https://00407fa8-a9ef-4b78-9bbe-46147fc8acf6.filesusr.com/ugd/5ecadc_7300109915ec46719578240b6bc9294e.pdf?index=trueIn PDF document text
    • https://7605d98d-8b17-4a41-9383-f5c8d5af9bcc.filesusr.com/ugd/2bed4c_4e1e63c60cac42e483c14aca10be27fa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F9 4848 bytes
SHA-256: f0428dea9986b4277a011341525043a86f93cd3e0a6202ba4afdf2e793e827b1
font_01_sfnt_off0000f989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF989 12312 bytes
SHA-256: 80c026c774aeb753376f35649aaeebda1cac852ea54bf687797d94a2da5ebed3
font_02_sfnt_off00012190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12190 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333