Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bc35acb946d11c5…

MALICIOUS

PDF

90.9 KB Created: 2021-06-06 15:43:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 6d10ee50c826e36aabcd08b04da4096e SHA-1: ca903e48a009dcaa244a4221adb760fc265b47d6 SHA-256: 2bc35acb946d11c5d408c19658555a71dde5a464577645d723d79127db6bb4ab
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm designed to redirect users to potentially harmful content. The presence of embedded URLs and the overall structure strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ginataxidorivez.weebly.com/uploads/1/3/4/0/134041929/80f67e132ee40.pdf In PDF document text
    • https://degegoza.weebly.com/uploads/1/3/0/8/130873855/6f959ac56db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462344/normal_604f4eeb0cc9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413243/normal_5fd1e11c13122.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453734/normal_60450c012b35e.pdfIn PDF document text
    • https://lamamamim.weebly.com/uploads/1/3/1/6/131606140/6013367.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410216/normal_600e371229440.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393904/normal_600c79d7b8f7b.pdfIn PDF document text
    • https://xewulatejema.weebly.com/uploads/1/3/5/3/135345986/4872240.pdfIn PDF document text
    • https://gefilatokakanor.weebly.com/uploads/1/3/7/5/137501249/sasad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491946/normal_6041ae3630fbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492900/normal_601987a41d674.pdfIn PDF document text
    • https://ketchas.ru/pbw?utm_term=%25D0%25B4%25D0%25B6%25D0%25BE+%25D0%25B4%25D0%25B8%25D1%2581%25D0%25BF%25D0%25B5%25D0%25BD%25D0%25B7%25D0%25B0+%25D1%2581%25D0%25B8%25D0%25BB%25D0%25B0+%25D0%25BF%25D0%25BE%25D0%25B4%25D1%2581%25D0%25BE%25D0%25B7%25D0%25BD%25D0%25B0%25D0%25BD%25D0%25B8%25D1%258F+%25D0%25B0%25D1%2583%25D0%25B4%25D0%25B8%25D0%25BE%25D0%25BA%25D0%25BD%25D0%25B8%25D0%25B3%25D0%25B0+%25D1%2581%25D0%25BA%25D0%25B0%25D1%2587%25D0%25B0%25D1%2582%25D1%258C+%25D1%2582%25D0%25BE%25D1%2580%25D1%2580%25D0%25B5%25D0%25BD%25D1%2582%25D0%25BE%25D0%25BCIn PDF document text
    • https://ketchas.ru/pbw?utm_term=%25D0%25B4%25D0%25B6%25D0%25BE+%25D0%25B4%25D0%25B8%25D1%2581%25D0%25BF%25D0%25B5%25D0%25BD%25D0%25B7%25D0%25B0+%25D1%2581%25D0%25B8%25D0%25BB%25D0%25B0+%25D0%25BF%25D0%25BE%25D0%25B4%25D1%2581%25D0%25BE%25D0%25B7%25D0%25BD%25D0%25B0%25D0%25BD%25D0%25B8%25D1%258F+%25D0%25B0%25D1%2583%25D0%25B4%25D0%25B8%25D0%25BE%25D0%25BA%25D0%25BD%25D0%25B8%25D0%25B3%25D0%25B0+%25D1%2581%25D0%25BA%25D0%25B0%25D1%2587%25D0%25B0%25D1%2582%25D1%258C+%25D1%2582%25D0%25BE%25D1%2580%2PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://xovakovawup.pbworks.com/w/file/fetch/144510861/42918693525.pdfIn PDF document text
    • http://jozeluwofe.pbworks.com/f/reaccin_de_sustitucin_ejemplos_en_la_vida_cotidiana.pdfIn PDF document text
    • http://xifatarege.pbworks.com/w/file/fetch/144685239/37180379693.pdfIn PDF document text
    • http://wemilamozede.pbworks.com/f/how_to_get_hourglass_figure_with_exercise.pdfIn PDF document text
    • http://deduxofevit.pbworks.com/w/file/fetch/144693594/93953922735.pdfIn PDF document text
    • http://dujimowiwup.pbworks.com/f/elton_john_easy_piano_sheet_music_free.pdfIn PDF document text
    • http://vixifalino.pbworks.com/f/tubidy_mp3_download_music_free_apk_download.pdfIn PDF document text
    • http://nojewalikar.pbworks.com/f/59184339355.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://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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000141e7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x141E7 16888 bytes
SHA-256: 52c9adcca337f49898927ccc1d058a0d959a80d690cbc3b991a60681df79fa66
font_00_sfnt_off0000f69d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69D 6140 bytes
SHA-256: 2b2de9d2a7d241a5a88cc747a251649b24fb47b152fb42a84a238448d290785f
font_01_sfnt_off00010b2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B2B 7016 bytes
SHA-256: dcbd5c505f419506b4f200c852b9932e976d6024fee974630477acd564708917
font_02_sfnt_off00011e20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E20 10532 bytes
SHA-256: 08af5ea183320569328bbc0719e024c3a6414cb556cc4f50e9b77c55a56a1dc4

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