Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dc08a4c976dd08f…

MALICIOUS

PDF

69.9 KB Created: 2021-06-05 01:04:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 24f46ce21bc2e58e6f7e80f9c2d65fa5 SHA-1: 11493f6b6f6e41fb34839bc60f77e869577bef9a SHA-256: 6dc08a4c976dd08f317a716df63a2d573b82325766b8096a6c73f6cc7d6ef5e9
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://wastran.ru/pbw?utm_term=can+a+python+snake+eat+a+person PDF link annotation
    • https://jobubati.weebly.com/uploads/1/3/1/4/131453688/c99694.pdfIn PDF document text
    • https://lufalejovi.weebly.com/uploads/1/3/1/3/131380058/totajokukaxogi-bonevuw.pdfIn PDF document text
    • https://juzasofudabin.weebly.com/uploads/1/3/0/7/130775050/69cc28c472.pdfIn PDF document text
    • https://fegemuvu.weebly.com/uploads/1/3/2/6/132695633/nejikodumira.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381302/normal_606a3dd73eda9.pdfIn PDF document text
    • https://takewozijofu.weebly.com/uploads/1/3/2/6/132682119/2fc69d8b3f7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427529/normal_5fc66909b2583.pdfIn PDF document text
    • https://jujavaxoziwes.weebly.com/uploads/1/3/4/1/134108829/1239081.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e79f41aa-fdee-4067-82bb-e12f412c22e2/37715859144.pdfIn PDF document text
    • http://wojipag.pbworks.com/f/nogizukegupojakep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae279d89-14a8-43be-b667-ee19b75d70fd/butterball_deep_fryer_turkey_breast.pdfIn PDF document text
    • http://sisagexal.pbworks.com/f/vergi_hukuku_mualla_ncel_2021.pdfIn PDF document text
    • http://jujupaw.pbworks.com/f/22924726775.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64d6e33d-c020-49c7-8dd6-a082cbb4a9ba/arduino_uno_datasheet_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bee5e42-e1d9-4875-a083-843b6407ca06/bow_tie_cinemas_movieland_6_schenectady_ny.pdfIn PDF document text
    • http://dobifapig.pbworks.com/f/pijojeluzivonifus.pdfIn PDF document text
    • http://vananizi.pbworks.com/w/file/fetch/144630618/google_play_store_app_game_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34c64269-0192-4a27-b359-e4d31827ce97/mawoxatapuweroluzufupam.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_off0000d45c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD45C 4948 bytes
SHA-256: dd8412df3ad42324474aa18116f188140428280508b06b7f9717455c3fd022c5
font_01_sfnt_off0000e52e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE52E 11044 bytes
SHA-256: 37f4f2c4ef7d6193b7ccad18b9990d506333555f1c7dcd38c741ba8f9b8ab88a

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