Malicious PDF — malware analysis report

Static analysis result for SHA-256 9483652b92b309e0…

MALICIOUS

PDF

87.5 KB Created: 2021-03-25 15:39:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 6100517e502344cce5d86d6734e3697c SHA-1: 3daf512d653b6eba0abffe3528f510f1023be66f SHA-256: 9483652b92b309e0103bff5eb017fa138b7c9c7b6bfb5bde473451e04d074a3c
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing. The embedded URL points to a site related to 'food adulteration', likely a lure to drive traffic to the link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/award?keyword=definition+of+food+adulteration+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4447250/normal_6011824881b5a.pdfIn PDF document text
    • http://fupemagis.mywebcommunity.org/what_is_simulation_and_simulacra.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402261/normal_60097ed6a09e3.pdfIn PDF document text
    • http://gigezesuzobe.getenjoyment.net/19311701858.pdfIn PDF document text
    • http://nizavevorupuj.mywebcommunity.org/ano_ang_kahulugan_ng_kultura.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465565/normal_5fcf25ea67b5f.pdfIn PDF document text
    • http://tolejif.22web.org/baby_einstein_sea_dreams_soother_musical_crib_toy.pdfIn PDF document text
    • http://womizepivilora.sportsontheweb.net/addition_with_regrouping_grade_1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374853/normal_5fdac65bb77e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404514/normal_602614a972686.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8c1dc56a-a131-4b43-acff-3635b9115217.filesusr.com/ugd/90423f_32f85191c2f9477494476938325bd2f7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4388eef3-82f4-4634-acd7-e6dfe6bec303/gexowuxako.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a5f3e99-6655-4fdd-8297-6a5d73aab4b6/is_lucifer_the_strongest_angel.pdfIn PDF document text
    • http://daduzafez.epizy.com/best_android_phones_in_nigeria_2019.pdfIn PDF document text
    • http://vaxotofeguzika.rf.gd/tennessee_williams_rose_tattoo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e85f5118-c689-404c-8dee-3b57cbc0d11f/relative_clauses_exercises_advanced_level_with_answers.pdfIn PDF document text
    • http://wenibeliso.atwebpages.com/50828623300.pdfIn PDF document text
    • http://zekilope.rf.gd/fiferavuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e54704b-e46b-46ec-a2c5-7c32b9e1f507/ganuxorosusimenanota.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce515736-65b1-4b61-ba82-562aeada47c3/diary_of_a_wimpy_kid_wrecking_ball_read_online_free.pdfIn PDF document text
    • http://rewojemod.rf.gd/aspergillus_spp.pdfIn PDF document text
    • https://9e705916-5bde-4eb8-be9b-8b3e910fbaf8.filesusr.com/ugd/c7a620_3e5e467e0fd64e66ae860377c70b7911.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_off0001179d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1179D 4856 bytes
SHA-256: 411d47449824d590a352fb2f12ff6041082ff11889571e7f77d62a0e854d651f
font_01_sfnt_off00012838.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12838 11764 bytes
SHA-256: 93e527265498995634959faeb30b1347421dff5e8331a17740af1ad81c26efda