Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f78a216572f57c5…

MALICIOUS

PDF

92.3 KB Created: 2021-05-10 21:13:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 169089a4f24d1634bc0bf2dd1348662e SHA-1: 9e7bd8da34f077ef1dd3ae71ce17466f3f2ac3aa SHA-256: 2f78a216572f57c56b5cff44fd1e5c24f7e3484bba2a0ac736b33cbd368ad1e9
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and numerous external URLs are indicative of malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • 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 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://fokemale.ru/strik?utm_term=filosofia+del+derecho+federico+hegel+resumen
    • http://sevoxotedeki.medianewsonline.com/67189767906.pdf
    • https://konoxitewe.weebly.com/uploads/1/3/4/4/134494736/6693793.pdf
    • https://pozivikebesar.weebly.com/uploads/1/3/4/7/134759309/fefobe.pdf
    • https://giduzuzetedeze.weebly.com/uploads/1/3/4/8/134853145/9313643.pdf
    • https://valisuzikejuxeg.weebly.com/uploads/1/3/4/0/134017117/fozozosinuj.pdf
    • https://salewuso.weebly.com/uploads/1/3/1/3/131379029/falasajaloxowi.pdf
    • https://pagudibaxite.weebly.com/uploads/1/3/1/4/131410234/faxumaxux-legokeside-jevuse-tukamujasagofik.pdf
    • https://cdn-cms.f-static.net/uploads/4424981/normal_5fd14e13d5176.pdf
    • https://daliroxemonove.weebly.com/uploads/1/3/0/7/130775241/4391222.pdf
    • https://cdn-cms.f-static.net/uploads/4501045/normal_60635ff60f8b6.pdf
    • https://wevenakexeg.weebly.com/uploads/1/3/1/4/131438808/koxokomal.pdf
    • https://cdn-cms.f-static.net/uploads/4488339/normal_602f175c1366c.pdf
    • https://static.s123-cdn-static.com/uploads/4421217/normal_5fef53016e42f.pdf
    • https://posapana.weebly.com/uploads/1/3/1/4/131454172/4924589.pdf
    • http://vadosixajobirug.mygamesonline.org/springer_physics_books.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://2a4065d7-883d-43e8-a524-7ce9aa4b4e88.filesusr.com/ugd/ccb1c6_4219e7c9462b4b7e8adb6e22d0fac546.pdf?index=true
    • http://mewabetowa.myartsonline.com/microsoft_project_cost_management.pdf
    • https://969948a0-d7f7-4827-958e-a3856fee42d4.filesusr.com/ugd/9d40bc_3d819cf07ef84b79a04eec9031162fa2.pdf?index=true
    • http://zisukuvi.atwebpages.com/business_environment.pdf
    • http://sawurawefivovo.myartsonline.com/87721662469.pdf
    • http://piwolimosopobu.myartsonline.com/how_to_be_legally_married_in_nigeria.pdf
    • https://ba30dffa-51fe-4caa-9472-6f142403a9bb.filesusr.com/ugd/c2007e_8171eda3d84f4ec6bcedf31f45b56a33.pdf?index=true
    • https://9dd02728-8b0e-4c16-8a5b-31b14a6ec887.filesusr.com/ugd/d8c3ed_0a2711aced3c4fcf9691cbec974a5d37.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001299d.bin
23b6ce851b05df489565061943c17a36a1562bf75665de9229fbe4b93d704b9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1299D 5392 bytes
font_01_sfnt_off00013bc8.bin
e9fed70595a8d0ad730e40dacb892fab212dad24237dc5fc06bf254136ffbc50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13BC8 11688 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.