Malicious PDF — malware analysis report

Static analysis result for SHA-256 84a785109fb5ccff…

MALICIOUS

PDF

86.7 KB Created: 2021-03-11 23:23:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2f880f505b03ef77d37ccd70a788add7 SHA-1: 4f02deac580aa9923ee20ba0ba7257fadfdd93b8 SHA-256: 84a785109fb5ccff3538b57f83ba82b63053411fb03d76b2798b8b7e5281c77a
186 Risk Score

Malware Insights

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

This PDF document contains numerous links to external websites, masquerading as a manual for a sewing machine. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://mezovuduw.ru/wix?keyword=manual+for+singer+sewing+machine+model+1120 PDF link annotation
    • https://zotawirimatoxo.weebly.com/uploads/1/3/4/0/134096886/1207535ac1823e.pdfIn PDF document text
    • https://fimibiwuru.weebly.com/uploads/1/3/2/6/132696060/mizorezixepipu-takesenexapi.pdfIn PDF document text
    • https://volokosebu.weebly.com/uploads/1/3/4/8/134871595/juxipipugupat.pdfIn PDF document text
    • https://fovevirikat.weebly.com/uploads/1/3/0/7/130775443/vowewuxifezumo.pdfIn PDF document text
    • https://jokozoxusatolof.weebly.com/uploads/1/3/1/0/131070378/2196761.pdfIn PDF document text
    • https://xemavuvewo.weebly.com/uploads/1/3/5/3/135394060/2937576.pdfIn PDF document text
    • https://widafesisitix.weebly.com/uploads/1/3/5/3/135321065/medano_kuremoxoros.pdfIn PDF document text
    • https://vewiwuxipax.weebly.com/uploads/1/3/2/6/132681682/74dfc2.pdfIn PDF document text
    • https://samoderusewon.weebly.com/uploads/1/3/1/3/131383586/zorolusef.pdfIn PDF document text
    • https://duxosefexi.weebly.com/uploads/1/3/4/6/134605181/4015507.pdfIn PDF document text
    • https://tetaretutu.weebly.com/uploads/1/3/4/8/134872422/zovulexikebe.pdfIn PDF document text
    • https://riginujer.weebly.com/uploads/1/3/2/6/132695799/romapanuboto-pakavewawefew-vagujawuwafe-nemusozegam.pdfIn PDF document text
    • https://gewolurigidanax.weebly.com/uploads/1/3/1/3/131383018/9e89abaed057e.pdfIn PDF document text
    • https://ruwagifixub.weebly.com/uploads/1/3/4/0/134013037/puwodadu-goniliz-kumuvukizala-vawimepasat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xuxerikafirin.epizy.com/kefekimexizixapazurojo.pdfIn PDF document text
    • http://xakitum.epizy.com/camerimage_program.pdfIn PDF document text
    • http://nubuxaza.rf.gd/wesilovufobeloko.pdfIn PDF document text
    • http://sosozodazu.epizy.com/63719540896.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5a74d6f-a4a4-427a-9098-3ebe8d8e3752/40412126886.pdfIn PDF document text
    • http://nanesipub.rf.gd/kososoxarawusaw.pdfIn PDF document text
    • http://tijopuzotozume.rf.gd/1993_marvel_cards_price_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4bf289f-f8b5-4cad-a191-2d2960aa79b1/97181752283.pdfIn PDF document text
    • http://mabukivo.epizy.com/doomsday_heist_money_guide.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_off000115af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115AF 5860 bytes
SHA-256: cc201b08af39b852e2278c42a7c65a38977a7e77a644316f451416e93c7fc923
font_01_sfnt_off00012998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12998 10476 bytes
SHA-256: 691e46bc9974e6ef0c4cd61406cfaaf00ca256d7218e25153ba3bc1025228292