Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e4407f104a0311f…

MALICIOUS

PDF

67.9 KB Created: 2021-03-16 19:56:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 47f603290a6ebe00cf8d665e68e5df9f SHA-1: 040eafa0a3974644bc0582076dae901263740de9 SHA-256: 3e4407f104a0311ff7f659546ca96a71e8527c91e1ff3e5690622fda2203bb16
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting or link farms, suggesting an attempt to redirect users to malicious sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a tactic to obscure the true destination by using many domains. While no scripts were explicitly extracted, the nature of the embedded URLs and the 'malicious' verdict strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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 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=kamus+bergambar+arab+indonesia+pdf PDF link annotation
    • https://zonujonuwug.weebly.com/uploads/1/3/4/3/134309714/6655642.pdfIn PDF document text
    • http://fobativ.mywebcommunity.org/zixoxupizuseperegoj.pdfIn PDF document text
    • https://digokevun.weebly.com/uploads/1/3/4/7/134747151/mirofanuzaj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487413/normal_60062512d927a.pdfIn PDF document text
    • http://nadozigipak.22web.org/beats_studio_wireless_instructions.pdfIn PDF document text
    • https://retowukiri.weebly.com/uploads/1/3/4/5/134592720/8744a0e9de865.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381098/normal_603a4fc212c7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423453/normal_5fd87c7c8e884.pdfIn PDF document text
    • http://maxoranano.sportsontheweb.net/attestation_assedic_particulier_employeur.pdfIn PDF document text
    • https://getivafet.weebly.com/uploads/1/3/5/9/135960962/491a698ecf4c815.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369927/normal_603c44d413cf1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379032/normal_5fe29bd54cf65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405197/normal_603f95055c196.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379722/normal_602c551610c9f.pdfIn PDF document text
    • http://kegetisa.mygamesonline.org/attestation_sur_l_honneur_de_prise_en_charge.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482671/normal_6001c8e9c8c83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480142/normal_6020988118b42.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464530/normal_5fc9cc630b1d3.pdfIn PDF document text
    • https://verikadofaja.weebly.com/uploads/1/3/2/3/132303102/7235710.pdfIn PDF document text
    • http://tufuwavaziga.mygamesonline.org/how_do_you_calculate_motor_efficiency.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xologikaju.atwebpages.com/gilozuxa.pdfIn PDF document text
    • http://vubelifijam.atwebpages.com/49409969725.pdfIn PDF document text
    • http://wekikoki.rf.gd/54987974689.pdfIn PDF document text
    • http://zotubune.myartsonline.com/behavioural_finance.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_off0000ce01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE01 5436 bytes
SHA-256: a47f9d1c26d80897c9d353f94ef90e3815b660ef6e70d3e0a715cca073819a00
font_01_sfnt_off0000e066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE066 9844 bytes
SHA-256: 0711effb3287eb2b8d9081223ad4d55d8f18ddf0d6e60e436414e1bd1f441e15

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