Malicious PDF — malware analysis report

Static analysis result for SHA-256 6500f14fc8ebe7fe…

MALICIOUS

PDF

75.0 KB Created: 2021-02-18 13:56:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 759659b94ce0e4d37b88f97a6d2aa571 SHA-1: 5464a48125ac5e0686632180307335bc5c89421b SHA-256: 6500f14fc8ebe7fe1058145dcea14dd688410771228048ce69b73a5d27bb7887
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains a large number of embedded links, many pointing to external PDF files hosted on disposable domains. Heuristics indicate this is a link farm, likely for SEO manipulation or to distribute further malicious content. The presence of a known malicious redirector URL and ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/aws?utm_term=break+even+analysis+assumes+over+the+relevant+range+that In PDF document text
    • https://xazebuwojij.weebly.com/uploads/1/3/4/4/134467588/famirixalirofigosuw.pdfIn PDF document text
    • https://wutejaguruloz.weebly.com/uploads/1/3/1/8/131871665/lodomegixenewef_bilibip_kubasumazilive_mebomurivibixa.pdfIn PDF document text
    • https://lonokowikur.weebly.com/uploads/1/3/5/3/135384913/bezojufid.pdfIn PDF document text
    • https://sezavifibeka.weebly.com/uploads/1/3/4/4/134463458/visitiduluj-vobonipanesa.pdfIn PDF document text
    • http://gadifurewurol.22web.org/mdm_bypass_tool_2._0.pdfIn PDF document text
    • https://milorupubi.weebly.com/uploads/1/3/4/3/134317418/tojixire.pdfIn PDF document text
    • http://fimosabu.iblogger.org/chess_score_sheet_sample.pdfIn PDF document text
    • https://tonuvufew.weebly.com/uploads/1/3/1/4/131438708/pinisuzirobanu_fetivuwegulikix.pdfIn PDF document text
    • https://goreduve.weebly.com/uploads/1/3/2/7/132740848/xutekamuw_bupubokevojani.pdfIn PDF document text
    • https://vomimefime.weebly.com/uploads/1/3/5/3/135316042/7630463.pdfIn PDF document text
    • https://wuxelulomevadi.weebly.com/uploads/1/3/4/9/134904547/wulini.pdfIn PDF document text
    • https://tisemijosugimuv.weebly.com/uploads/1/3/1/0/131070246/749998.pdfIn PDF document text
    • https://favujoki.weebly.com/uploads/1/3/5/3/135302790/4f6708e1d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nufejubonuviwo.epizy.com/95990389979.pdfIn PDF document text
    • http://vaburerewixa.rf.gd/56910790295.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/kuwasivak.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/reflect_and_square_root_transformation_in_spss.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/50110628714.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/sanolurabijudiruzuvezif.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD198 5716 bytes
SHA-256: 1b10872150dcf0948278809c5cf380969b7e67e3f7702c5df578f907b06e33d5
font_01_sfnt_off0000e542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE542 5376 bytes
SHA-256: a8599677a692cf5518cac1b01b67087fb3ce35cf69e892f3ed9a19e350135e00
font_02_sfnt_off0000f772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF772 10764 bytes
SHA-256: 1eb8d5b7720d19c402075a70d1241d46d2d89ed816a4117a5fa00d8996680e3e