Malicious PDF — malware analysis report

Static analysis result for SHA-256 18ed24cc9793671b…

MALICIOUS

PDF

93.7 KB Created: 2021-03-19 14:07:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 7204527d8a8843c52ab93dc69de09bef SHA-1: ae17db65df8d7af74609fb2efb457981dd5f13d9 SHA-256: 18ed24cc9793671b6014145b4efe6032d2f6306686ee196fc32f0bdff09d411d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL pointing to a domain associated with link farms and disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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://lozipotod.ru/wix?keyword=clover+hill+high+school+midlothian+va+23112 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382414/normal_5fdb8eaa9b6d3.pdfIn PDF document text
    • http://pubgmobiie.com/xinigaxiaritr.pdfIn PDF document text
    • http://zasasibibo.iblogger.org/51968941665.pdfIn PDF document text
    • http://wugipesirexoxof.mygamesonline.org/alpinion_e_cube_5.pdfIn PDF document text
    • http://bimizuzi.sportsontheweb.net/69798793292.pdfIn PDF document text
    • http://i-men.ru/bekifajonosejubedak7iyiq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370269/normal_6026a5886bb81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376869/normal_604d0f97885b4.pdfIn PDF document text
    • http://mosquito.codes/kavijoxac8gkn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387430/normal_603eb5068d6d6.pdfIn PDF document text
    • http://lnstagramoriginal.com/vocabulary_worksheets_for_3rd_graderszbht0.pdfIn PDF document text
    • http://vakimudefevu.22web.org/advantages_of_whistleblowing.pdfIn PDF document text
    • http://nasporte1.fun/fuxujixepikapur004uh.pdfIn PDF document text
    • http://jelelegukawox.22web.org/is_saga_home_insurance_any_good.pdfIn PDF document text
    • http://sutivetowit.mypressonline.com/39072814859.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421039/normal_6035702ea8ec3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://aa514bbb-a96e-4bc9-8ff3-0ca2edd1104f.filesusr.com/ugd/3fc21f_155a55998b0140008a1873773b0c7499.pdf?index=trueIn PDF document text
    • https://17851959-1482-4b49-8222-7b7b0c628459.filesusr.com/ugd/3cb679_990dd8d36334441a830290aa2beab9e1.pdf?index=trueIn PDF document text
    • https://02e0da19-eac5-4521-950b-4e410541bf1c.filesusr.com/ugd/516249_cb09ada0f0b74825926f7248a62c0e8c.pdf?index=trueIn PDF document text
    • https://4c2674ec-1430-4cec-a455-d6a35d10586e.filesusr.com/ugd/38955b_a0ff8dcee8df45deb3f5f0da8dbb4cf0.pdf?index=trueIn PDF document text
    • http://posojorodinu.epizy.com/wudigatakanodepobafiweja.pdfIn PDF document text
    • https://5ce19dfa-329f-495d-88d1-e1e7834d9072.filesusr.com/ugd/d902bb_811722fe3d874b919482bce0db8a3d51.pdf?index=trueIn PDF document text
    • https://41c240d9-b4af-4f88-8fa4-2a41cce3a287.filesusr.com/ugd/01bc73_41d3f3ed4b9249cd8f955927d04d77a5.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012d73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D73 5668 bytes
SHA-256: 4cae4fc0505885c21b1bd08914afcc19042ac0688d72f07b497b023e8b32a82b
font_01_sfnt_off00014091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14091 11972 bytes
SHA-256: e235e4b790e0f282867f6682a6187449d26c459dc8449a61bd258955eb37ba22

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