Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd757e8c04ecd644…

MALICIOUS

PDF

111.5 KB Created: 2021-05-06 01:03:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: a195257bd1e09066f42a587349bb3a77 SHA-1: 261a4e07744d58f013e46c109871f1cd20be1154 SHA-256: fd757e8c04ecd6442446afa356957465403b7c8678ba000a41a1734cde955ad1
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, identified as a link farm, likely intended to redirect users to malicious or SEO-manipulated content. The ML classifier and ClamAV detection strongly indicate malicious intent, with the primary technique being the distribution of malicious links within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://gimoguvi.ru/strik?utm_term=what+is+the+most+significant+development+in+the+history+of+western+philosophy PDF link annotation
    • https://rifodajawu.weebly.com/uploads/1/3/0/7/130739776/1616292.pdfIn PDF document text
    • https://guvefivilemu.weebly.com/uploads/1/3/4/3/134397682/3014311.pdfIn PDF document text
    • https://wepebajaka.weebly.com/uploads/1/3/4/5/134588919/9564018.pdfIn PDF document text
    • http://rerulekoba.66ghz.com/vikisegiwafulawenuziwego.pdfIn PDF document text
    • https://zepareremuxox.weebly.com/uploads/1/3/4/7/134772384/tirob.pdfIn PDF document text
    • https://jaxoruxevag.weebly.com/uploads/1/3/1/6/131606876/ac267.pdfIn PDF document text
    • http://xemuzaxu.22web.org/wrong_turn_english_movie_all_parts.pdfIn PDF document text
    • https://lanekugufer.weebly.com/uploads/1/3/5/3/135351315/fuwufugilobiwijane.pdfIn PDF document text
    • http://zarewubizeno.mywebcommunity.org/cantigas_de_maldizer.pdfIn PDF document text
    • https://jitugexe.weebly.com/uploads/1/3/0/9/130969989/kugogex_satazewinudevul.pdfIn PDF document text
    • https://dofonumid.weebly.com/uploads/1/3/5/3/135314870/1fc583ea1b.pdfIn PDF document text
    • https://rirujidina.weebly.com/uploads/1/3/5/9/135957349/fuzukutada.pdfIn PDF document text
    • https://vapatukubarokul.weebly.com/uploads/1/3/0/7/130739856/6277743.pdfIn PDF document text
    • https://wugizagopa.weebly.com/uploads/1/3/5/3/135311922/maveruvin.pdfIn PDF document text
    • https://xomuwesakutizid.weebly.com/uploads/1/3/5/3/135393414/lisumovura-pobupafew.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/genedesowul/15091487962.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/49383990655.pdfIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/80253227973.pdfIn PDF document text
    • http://lumosaneja.onlinewebshop.net/wikoliboga.pdfIn PDF document text
    • http://zakexukosogu.atwebpages.com/36390652068.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/aye_watan_aye_watan_song_lyrics.pdfIn PDF document text
    • http://romevakamijoke.epizy.com/examples_of_solubility_answers.pdfIn PDF document text
    • http://wofiwapuret.rf.gd/meluzufowobizonuzarukiwi.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_off00017605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17605 5836 bytes
SHA-256: 5f8dbfec7155553ad421c94645a5dd9de897fce63919b51b5507f195d2b59709
font_01_sfnt_off000189e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x189E1 10616 bytes
SHA-256: 9e6700cd4171ec07eac968b6ab8d22356839966399924e3887e0d99d8d379073

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