Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0a604d770fd70c4…

MALICIOUS

PDF

87.0 KB Created: 2021-05-23 22:35:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: dbb479550487e6c08db47eed23d94d1d SHA-1: 260fc537549d39ea63dfd4d5cabf0ff286ff7e2e SHA-256: d0a604d770fd70c4e77465f9e7ec717e966fcdef465d746d1f28eb2cf1586f4f
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to redirector infrastructure and a link farm, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature. Although no scripts were extracted, the presence of numerous malicious URLs suggests the document's primary function is to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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 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.
  • 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/strik?utm_term=%25C3%25BCstel+fonksiyon+grafikleri+soru+ve+%25C3%25A7%25C3%25B6z%25C3%25BCmleri In PDF document text
    • https://static.s123-cdn-static.com/uploads/4405430/normal_5ffd02642d88b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368969/normal_603994e1b9f2f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472475/normal_5fc922ffceffb.pdfIn PDF document text
    • https://mezepobavufu.weebly.com/uploads/1/3/4/7/134717124/xuxanu-monibamuduvuxu-rewapenunivuxa-ruwatok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449788/normal_606e916335b7a.pdfIn PDF document text
    • https://dosogomufafana.weebly.com/uploads/1/3/2/6/132696174/1680110.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483624/normal_6039838e0472d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409818/normal_60693f1dcf99b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470211/normal_5ff40774baac6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387408/normal_602d2c1a76d4f.pdfIn PDF document text
    • https://rakimazigikan.weebly.com/uploads/1/3/2/3/132303322/1029220.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422371/normal_6063e76e61e1e.pdfIn PDF document text
    • https://zopojidiluze.weebly.com/uploads/1/3/4/3/134361294/sobadujewabaz-wuwelavitu-sanimanujero.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478125/normal_603bbbc4d2d71.pdfIn PDF document text
    • https://wagimudo.weebly.com/uploads/1/3/4/4/134475497/zoribijujazuwataxu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460708/normal_5fe47f7841966.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://s3.amazonaws.com/zesixefe/call_ended_vs_call_not_answered_whatsapp.pdfIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/5080916023.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/reporting_anova_assumptions_apa.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/checkselfpermission_android_kotlin.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/stargirl_jerry_spinelli_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/jiwivimo.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/55240819187.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/informacion_nutricional_del_salvado_de_trigo.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_off000106f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F2 5700 bytes
SHA-256: 9e384dc81f65dd9559d362747d4e775ba0526dc8adb01934815d1182f1646f24
font_01_sfnt_off000119d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119D7 10540 bytes
SHA-256: 733e2635bfc8e431039d1927bcb0e713c5a485e4400246036105d82307aa4f60
font_02_sfnt_off00013d77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D77 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333