Malicious PDF — malware analysis report

Static analysis result for SHA-256 b93372e17f2f01d4…

MALICIOUS

PDF

78.8 KB Created: 2021-03-05 01:00:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 3fe5ab75d80257c02070c12a3bc87028 SHA-1: 29ca0de899758fb6a3912c448f81692acb360dfa SHA-256: b93372e17f2f01d4c78c8ace6d6eed949d472988d253d6619fb8749239270f1a
194 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO spamming operation. The presence of a 'download button' lure and a high ML classifier score, along with ClamAV detection as Pdf.Phishing.Trojan, strongly suggests malicious intent. The primary URL, https://golowaki.ru/award?keyword=avid+pro+tools+11+crack+mac, points towards a lure for cracked software, likely leading to malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://golowaki.ru/award?keyword=avid+pro+tools+11+crack+mac PDF link annotation
    • https://gefivepuli.weebly.com/uploads/1/3/4/6/134620723/zuwapemux.pdfIn PDF document text
    • http://dixurujisefumet.22web.org/11792417337.pdfIn PDF document text
    • http://loxebosobudi.66ghz.com/15798041971.pdfIn PDF document text
    • http://dakujuzoma.22web.org/dating_website_templates_free.pdfIn PDF document text
    • http://zakababonedip.iblogger.org/butubojaluxeges.pdfIn PDF document text
    • https://teribizekejuxes.weebly.com/uploads/1/3/5/3/135391999/vejabetom.pdfIn PDF document text
    • http://ropufogesuzazeg.iblogger.org/rosavaxugez.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fonimegalidoxu.epizy.com/coordinate_geometry_worksheets_grade_10.pdfIn PDF document text
    • https://80c93ba6-74df-4afb-9852-3a83eaba20e3.filesusr.com/ugd/4cf28d_30e90779adbd45c48a6db133b502189e.pdf?index=trueIn PDF document text
    • http://tadukaxuzevida.epizy.com/68905303091.pdfIn PDF document text
    • https://7f06b679-e14d-4525-8955-d56a7cf6f710.filesusr.com/ugd/79e5df_8caa96ab40b4427cbd73dcfaf4ec23f3.pdf?index=trueIn PDF document text
    • http://vezufokat.rf.gd/almyra_font_free.pdfIn PDF document text
    • http://zopegekole.rf.gd/bolokamukedulu.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/zixuwanirulinexukamusu.pdfIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/povapixovikanabuwo.pdfIn PDF document text
    • https://393102e6-89af-4738-8cad-89662dba8dc5.filesusr.com/ugd/33a16d_15e664b02c554640a572531465b52faf.pdf?index=trueIn PDF document text
    • http://xezujuwevan.epizy.com/graphic_design_proposal_template.pdfIn PDF document text
    • https://1482387f-61d8-47e1-b538-9b7f1e8b89fb.filesusr.com/ugd/538d67_fda8fe91e4f94e0ba0ed61b800998996.pdf?index=trueIn PDF document text
    • https://22449060-8e30-4723-8828-967625cce342.filesusr.com/ugd/eddc50_261c832caa81497cbb8d9a2eb760a7a2.pdf?index=trueIn PDF document text
    • http://dadusuxu.rf.gd/simple_excel_invoice_template_free.pdfIn PDF document text
    • http://mepukigumibusi.epizy.com/vixafitilumal.pdfIn PDF document text
    • http://fadirejanebebi.epizy.com/jilaxirijaperuvuwade.pdfIn PDF document text
    • http://darafefe.rf.gd/6022449025.pdfIn PDF document text
    • http://zozivudo.rf.gd/easy_acrylic_painting_ideas_flowers.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_off0000f8ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CA 5384 bytes
SHA-256: e5648071b630d9dd7048221e99d4eb8f5a8f677a5a44c11ce712b8260fb2991f
font_01_sfnt_off00010b17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B17 10184 bytes
SHA-256: d81257b86c046628998da30ed984667ec3f83cd5c0560840c56f5c7b34d190a6