Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0ea2a897970c287…

MALICIOUS

PDF

76.9 KB Created: 2021-04-18 05:22:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: b7d187159351063cb5488438f2c53ee9 SHA-1: 21aadeb7bc8316285e6bf44f5a4a2b960299c9ac SHA-256: c0ea2a897970c28719a0910184fb05236b74ca6524c811033fcb97e9362bb768
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or scam lure, likely using embedded JavaScript to facilitate redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://fokemale.ru/strik?utm_term=2012+thermo+king+reefer+trailer+for+sale PDF link annotation
    • https://xuzabuteke.weebly.com/uploads/1/3/1/3/131379980/ronuwoleligov-navamebudo-vidave-jufuzetavukuz.pdfIn PDF document text
    • http://zazorin.scienceontheweb.net/72548811506.pdfIn PDF document text
    • https://venefenotufawu.weebly.com/uploads/1/3/0/7/130775800/f39add2d.pdfIn PDF document text
    • http://rivozuzeno.mywebcommunity.org/astm_a1064_a1064m.pdfIn PDF document text
    • https://depumubawaminuk.weebly.com/uploads/1/3/4/2/134236244/nanefoju.pdfIn PDF document text
    • http://menbp.online/moonlight_helix_jump9pd0x.pdfIn PDF document text
    • https://pipedexow.weebly.com/uploads/1/3/4/8/134852679/ruxakig_devolilupepe_jemozakufokig_jewefejek.pdfIn PDF document text
    • http://jivavesomuviz.getenjoyment.net/identifying_emotions_activities_for_adults.pdfIn PDF document text
    • https://fatofexar.weebly.com/uploads/1/3/4/6/134687548/fepezotarew_kebazalaza_girujofagorim.pdfIn PDF document text
    • https://cdn.sqhk.co/besudamuge/YjbhdtF/85192394331.pdfIn PDF document text
    • https://cdn.sqhk.co/jadizefon/ayT8jiI/wenuvon.pdfIn PDF document text
    • http://mobeditobaxul.scienceontheweb.net/nedemuxatisom.pdfIn PDF document text
    • https://cdn.sqhk.co/kawaniroti/KhYhhl6/cubesmart_germantown_nashville.pdfIn PDF document text
    • http://slamelina.website/fajexudomisibibetvyhu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://233b4d2f-9c44-4004-b776-098ebc281e6f.filesusr.com/ugd/7f980c_8c5a06e3f7d74ac885cdff017bc188b5.pdf?index=trueIn PDF document text
    • https://ddb281da-11d2-423e-b83a-408ecf1f607f.filesusr.com/ugd/9db61c_b5ab2e3121c3400dace05ae5db3f3701.pdf?index=trueIn PDF document text
    • https://5c2df1de-05ea-4e17-9aa3-38adc7ce3153.filesusr.com/ugd/ddd609_4f9aac4b7bb14086919fae40b1271f8e.pdf?index=trueIn PDF document text
    • https://ddd90330-5837-4e0c-b2f6-9383941cd2db.filesusr.com/ugd/568e2c_60dc9b454f674505bcc8edb58b09ad1d.pdf?index=trueIn PDF document text
    • https://6323cc82-cf72-43ae-bc7a-f8d691a1d37e.filesusr.com/ugd/4f3578_09f90d9203504acc8caa6db77c169e82.pdf?index=trueIn PDF document text
    • https://0298dc5a-7924-4276-8279-06452a5288da.filesusr.com/ugd/b30cf0_c17d55feabd84f33820b85cd23528897.pdf?index=trueIn PDF document text
    • https://0e01c86c-6ad9-43de-bc04-b8819f410213.filesusr.com/ugd/73c254_c836e9131ecb467eb9ed239cd48491be.pdf?index=trueIn PDF document text
    • https://77a48bbd-706a-45f8-a225-ac1cc02029d7.filesusr.com/ugd/3be48b_2241db7279fe4768967defac063880de.pdf?index=trueIn PDF document text
    • https://7afd96e6-4611-46d4-9b98-d111b897c281.filesusr.com/ugd/154221_af941c13bee9417eb7205b109a69f5b5.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE05 5264 bytes
SHA-256: 4e1b8514dcefb7fc6f7bbf1955ec3589870dd5e401e63b184113117fe2761798
font_01_sfnt_off0000efb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB7 11224 bytes
SHA-256: 76b75d49bdf5342406e3fa77903095eb49bd7515a6bacc941ed744679b012b15
font_02_sfnt_off0001162a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1162A 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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