Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4f23f2b88607234…

MALICIOUS

PDF

103.5 KB Created: 2021-02-09 06:01:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 87a617236c59cfb34846f0a7d41616ab SHA-1: cb30cf3369ffad2b9e62d6053bde6680eb7776bf SHA-256: d4f23f2b886072345fb48ddf30b39f5df9f7ddda2ffaac8ba64be282e95326a5
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable domains and redirector infrastructure, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are characteristic of phishing lures designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/aws?utm_term=desh+bhakti+song++site In PDF document text
    • http://brumbum6.xyz/motivational_letter_for_bursary_funding_example1gjec.pdfIn PDF document text
    • https://pagafika.weebly.com/uploads/1/3/5/3/135339488/retodidunizejij_bikivorugu_biwidi.pdfIn PDF document text
    • https://wojawodexof.weebly.com/uploads/1/3/4/6/134673733/f59d2927c5f4.pdfIn PDF document text
    • http://vabakavolageni.22web.org/drivers_bematech_mp-_100s_th.pdfIn PDF document text
    • http://godulonu.22web.org/boxuvaxa.pdfIn PDF document text
    • https://cdn.sqhk.co/roziguze/Ufghugc/nixovugubesujixasu.pdfIn PDF document text
    • https://cdn.sqhk.co/suxupijisajo/iiiMs1t/atomic_arcade_pinball_free_download.pdfIn PDF document text
    • http://maximizator.xyz/arabic_trap_music_ringtone_download8sco2.pdfIn PDF document text
    • https://cdn.sqhk.co/mowasikuso/9xD1bNe/20312814928.pdfIn PDF document text
    • http://smartline58.ru/guzugelinizuxanubekixu46rbx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://runugerobel.rf.gd/12333413405.pdfIn PDF document text
    • http://witopovuketoj.epizy.com/mevadezetuxikuxudomi.pdfIn PDF document text
    • http://nonepajurela.rf.gd/bksb_english_test_answers.pdfIn PDF document text
    • http://maladovefo.rf.gd/pukixesexa.pdfIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/62477291791.pdfIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/rajusuge.pdfIn PDF document text
    • http://jokokisenekal.epizy.com/ababanna_ego_akokwalam.pdfIn PDF document text
    • http://rupevapunalude.rf.gd/comparative_degree_of_adjectives_worksheets.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013a5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A5F 10400 bytes
SHA-256: d724628043a83369f0a3f07ea4782f6654b7844238a1c54f09c25dfdd99cf63f
font_01_sfnt_off00015afa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15AFA 5024 bytes
SHA-256: 65798a2849513a664e9b8494e02e342520d59c24522240d67f47f4d84f755aa3
font_02_sfnt_off00016c19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C19 10756 bytes
SHA-256: 1ede840b02761db44ca691c1ece96a09a3266b6f604ead2499cca75ca1116f7d

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