Malicious PDF — malware analysis report

Static analysis result for SHA-256 cea084df9f95f60d…

MALICIOUS

PDF

99.2 KB Created: 2021-03-19 08:53:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 758c2ad4795c303f8332e54628d53a53 SHA-1: 64c15b81ec676c64474512bf78eaef009d82c923 SHA-256: cea084df9f95f60d0afb65b2965c03766a5344f0afa9ab104eb0007fcd8bdcf3
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The file contains a large number of external links, many hosted on disposable domains, indicating it functions as a link farm. The primary URL suggests a lure related to an espresso machine, likely a phishing or scam attempt. No scripts were extracted, but the PDF structure itself facilitates the redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://kuzutuzo.ru/strik?utm_term=saeco+xsmall+vapore+black+super-automatic+espresso+machine PDF link annotation
    • https://tixedasuke.weebly.com/uploads/1/3/5/9/135979549/8602751.pdfIn PDF document text
    • https://bafuzonexive.weebly.com/uploads/1/3/0/7/130739369/6d9c9d92043.pdfIn PDF document text
    • https://rofexelugikovu.weebly.com/uploads/1/3/4/7/134732340/1bfbf9f4d70.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402721/normal_60064b2ee2c74.pdfIn PDF document text
    • https://loniforuwo.weebly.com/uploads/1/3/4/9/134904684/4748785.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373788/normal_602ef8419389b.pdfIn PDF document text
    • http://italdom.fun/20909002580koyyw.pdfIn PDF document text
    • https://kavuxidawikux.weebly.com/uploads/1/3/4/0/134000359/pesewegozitek-fumuxedivigat.pdfIn PDF document text
    • https://wolapegod.weebly.com/uploads/1/3/0/7/130776073/2f33147.pdfIn PDF document text
    • https://wavikifetin.weebly.com/uploads/1/3/4/9/134901048/3981417.pdfIn PDF document text
    • https://tugixafebav.weebly.com/uploads/1/3/2/6/132681891/mifarafuxozu-defotufosud.pdfIn PDF document text
    • https://depasosuva.weebly.com/uploads/1/3/4/4/134483816/tilanu.pdfIn PDF document text
    • https://leguwilevifemat.weebly.com/uploads/1/3/4/5/134595517/2552838.pdfIn PDF document text
    • http://teachost.com/74925145674uyqqm.pdfIn PDF document text
    • https://pevunefimexog.weebly.com/uploads/1/3/1/0/131070247/dideladukof.pdfIn PDF document text
    • https://bonikelebosobi.weebly.com/uploads/1/3/2/8/132814552/61fe721bcab15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420906/normal_60299fb854a91.pdfIn PDF document text
    • http://my-favshop.online/how_to_train_chest_and_tricepso2hnw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378405/normal_60446edb77dbc.pdfIn PDF document text
    • https://gopilabuvimira.weebly.com/uploads/1/3/1/4/131453416/cf8419928862.pdfIn PDF document text
    • http://itsamorem.com/serezugeqwpj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d874387-68f9-41ac-9c20-a9a39c7cbe0e/maytag_2000_series_dryer_belt_replacement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b42b1f2-f37c-41e5-91ab-703e1cb33189/keurig_2.0_manual_needle_maintenance.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_off0001437b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1437B 5640 bytes
SHA-256: b95b7b5dddff5c130859078d617d7cf47ff3539a1936115698a48e352ba31d34
font_01_sfnt_off00015689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15689 11868 bytes
SHA-256: 63d70e10d1650595fefbb53826e060cb985e80c408a3eb0865ac3e937fab5380