Malicious PDF — malware analysis report

Static analysis result for SHA-256 018d6fbf53633de7…

MALICIOUS

PDF

89.9 KB Created: 2021-05-30 05:11:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: a170e4644a85afcb5787013b46279d7c SHA-1: d1bd2ea17fc4bcff05a564a06c704bf850564c39 SHA-256: 018d6fbf53633de7f4eae224c61ad8552af34f866b8879c5b6a31d86786baabf
186 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing or malware distribution lure, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. It contains numerous external links, many hosted on disposable domains, suggesting an attempt to redirect users to malicious content. The ML classifier and ClamAV detection further support its malicious nature, flagging it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://dugedepap.ru/strik?utm_term=el+basilisco+chilote+worksheet+answers PDF link annotation
    • https://ziroluberunoreg.weebly.com/uploads/1/3/4/4/134456507/5608937.pdfIn PDF document text
    • https://mobuzuwatajol.weebly.com/uploads/1/3/4/3/134310732/rijiwodekidibowefu.pdfIn PDF document text
    • https://worubagazew.weebly.com/uploads/1/3/4/6/134639575/3519621.pdfIn PDF document text
    • https://verefatodefi.weebly.com/uploads/1/3/4/7/134722939/7962cb985e9dbb.pdfIn PDF document text
    • https://seroselek.weebly.com/uploads/1/3/4/6/134636573/1354881.pdfIn PDF document text
    • https://varipejat.weebly.com/uploads/1/3/0/7/130739080/8404865.pdfIn PDF document text
    • https://towetebofipu.weebly.com/uploads/1/3/1/4/131437669/kikoxosizisi-niwavonuzal-rireb-wibixujixiredid.pdfIn PDF document text
    • https://guxilidokuwog.weebly.com/uploads/1/3/0/7/130738661/kunurakuwizagipi.pdfIn PDF document text
    • https://mewofotas.weebly.com/uploads/1/3/4/5/134524455/4391440.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455673/normal_601779bb48ab7.pdfIn PDF document text
    • https://kikuwigew.weebly.com/uploads/1/3/1/4/131407235/danudijosabofa.pdfIn PDF document text
    • https://kovorugoza.weebly.com/uploads/1/3/1/3/131383314/foxijav.pdfIn PDF document text
    • https://legovizadedugid.weebly.com/uploads/1/3/1/8/131856283/7680856.pdfIn PDF document text
    • https://jesilezozuzi.weebly.com/uploads/1/3/4/7/134745232/bezumuwu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446151/normal_602e6772b371b.pdfIn PDF document text
    • https://xexibufit.weebly.com/uploads/1/3/0/7/130739933/762207.pdfIn PDF document text
    • https://maloxozalujov.weebly.com/uploads/1/3/4/6/134624338/d49458445b.pdfIn PDF document text
    • https://xudowiwigikit.weebly.com/uploads/1/3/4/4/134462868/b4a304c7.pdfIn PDF document text
    • https://vawanateriti.weebly.com/uploads/1/3/0/9/130969814/d4a7ab0f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370791/normal_602e418d360b6.pdfIn PDF document text
    • https://vatizojisizekig.weebly.com/uploads/1/3/4/8/134852150/0c0cec16f0de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458389/normal_600ca0da8dc5c.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/8486a1f3-63ec-41cb-abf4-5354ecafe713/agar.io_bots_extension_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47349e25-8d95-4a79-813f-03444c12302a/87099414968.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_off00011f20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F20 5140 bytes
SHA-256: 0c876b27329e8df0770e2fa0d2518bd22fe67f16a884235960c8f9d069943324
font_01_sfnt_off000130a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130A8 12736 bytes
SHA-256: 5016f304a28395a6fbf3dce19da9aeccaf69aa14b081c9ed195eee1e605be161