Malicious PDF — malware analysis report

Static analysis result for SHA-256 50e2e19d500e7aec…

MALICIOUS

PDF

96.7 KB Created: 2021-03-19 21:22:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: c47f6606ed18cb5122996d369f34e895 SHA-1: 53e5b46ae33a3723d394aaa132e2cf7be5f16676 SHA-256: 50e2e19d500e7aec8c6e76229f1a8e932b7b68d0d16ef356e7db51d8e55179ac
212 Risk Score

Malware Insights

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

This PDF document is identified as malicious due to its extensive use of link farms pointing to numerous external PDF files hosted on disposable domains. The primary heuristic firings indicate a critical redirection link to known malicious infrastructure and a large number of SEO-oriented links, suggesting a phishing or malware distribution scheme. While no scripts were extracted, the document's structure and embedded URLs strongly suggest it's designed to lure users to malicious sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3211

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
  • 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.
  • 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.
  • 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/award?keyword=contoh+percakapan+bahasa+arab+sehari+hari+dan+artinya+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4489259/normal_5fd7f8e218e3f.pdfIn PDF document text
    • https://cdn.sqhk.co/juvebuzizej/KxKpQge/tisaguxuragurenod.pdfIn PDF document text
    • https://cdn.sqhk.co/mamevugixej/gdgihgl/pewdiepie_tuber_simulator_apk_uptodown.pdfIn PDF document text
    • https://tudaluvakagovax.weebly.com/uploads/1/3/4/6/134614365/kumanetotina_parat_guginuti.pdfIn PDF document text
    • https://wudizabilizone.weebly.com/uploads/1/3/4/7/134745746/farumajusukirefupuve.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzozuni/hhnQwhe/fewosupivipabujosuzepova.pdfIn PDF document text
    • https://zatozidebowetam.weebly.com/uploads/1/3/1/3/131398213/4511490.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502870/normal_5fea39a0dfafd.pdfIn PDF document text
    • https://jerewetazawupej.weebly.com/uploads/1/3/4/3/134384555/9138743.pdfIn PDF document text
    • https://cdn.sqhk.co/beratinuga/gejaTha/rugomunabemo.pdfIn PDF document text
    • https://cdn.sqhk.co/businaxidare/hehjhd3/identity_v_second_danganronpa_crossover.pdfIn PDF document text
    • https://sebumowuvuxeluz.weebly.com/uploads/1/3/5/9/135962316/9901569.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420906/normal_600df7477d83c.pdfIn PDF document text
    • https://ziwagugo.weebly.com/uploads/1/3/4/1/134131511/9759845.pdfIn PDF document text
    • https://cdn.sqhk.co/goberirud/gfoiiq5/vaxavopikalefusigerabe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451561/normal_5fd0d3c66295f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387808/normal_5fe3bc43e4780.pdfIn PDF document text
    • https://cdn.sqhk.co/tokafumotebi/hjhWiaM/tilifutola.pdfIn PDF document text
    • https://cdn.sqhk.co/livejizilul/X9whcDs/fumenet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379359/normal_6029543d37afc.pdfIn PDF document text
    • https://zitadinenere.weebly.com/uploads/1/3/1/8/131871439/nawinusize_wuwuvumuku.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000145ce.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x145CE 31352 bytes
SHA-256: ffc164af2596ec07ddfbdac55f86e618c95e0df9d2f31b7675db2efd220ac3eb
font_00_sfnt_off00010f01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F01 5424 bytes
SHA-256: 6e985f55394eb998d1906634af485fb45dbd34cc59c8c8ebe2154d597b9b9e5a
font_01_sfnt_off00012167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12167 10620 bytes
SHA-256: 2af815a5a3445467c309359d35bb7f61b03810f7a83c180bc0bfeeb4aaa850fc

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