Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eeb9478a7218583…

MALICIOUS

PDF

86.3 KB Created: 2021-03-15 02:57:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: afeae070cf339599933dc7d6e8eb7236 SHA-1: d0c6e27539bd262da9539283dbc517cbfa4c55b5 SHA-256: 2eeb9478a7218583663346a767dd5140274b5b8932518f7c2d0a9c72a322a44f
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 of which point to external resources, suggesting a link farm or redirection strategy. One critical heuristic indicates links to known malicious redirector infrastructure, and another flags it as a PDF SEO link farm. The ClamAV detection and ML classifier further support its malicious nature, likely for phishing or malware distribution.

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 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://dafemum.ru/strik?utm_term=free+english+learning+center+near+me In PDF document text
    • http://bukupiduge.mypressonline.com/what_is_the_average_salary_of_an_amazon_employee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392658/normal_6016e1e04deeb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502819/normal_5febff12e9013.pdfIn PDF document text
    • http://jolijivik.scienceontheweb.net/samenopovubikilutukivafif.pdfIn PDF document text
    • http://befotuke.mywebcommunity.org/dan_brown_books_in_order_da_vinci_code.pdfIn PDF document text
    • http://ketoxitigojaluk.sportsontheweb.net/mulamexunapel.pdfIn PDF document text
    • http://bifovogixugot.22web.org/20721182084.pdfIn PDF document text
    • https://dujezipiver.weebly.com/uploads/1/3/4/6/134610991/xujokirij_wobujudodonenim_falelumivejuje_vibirogo.pdfIn PDF document text
    • https://nosuzodudoj.weebly.com/uploads/1/3/4/5/134588086/wakamefatezofid_kumasedufurepuk.pdfIn PDF document text
    • http://bowuvudofi.scienceontheweb.net/vugaxoxanapebuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416661/normal_5fd7d5744def4.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/xafaxotaful/autophagy_review.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/best_audio_spectrum_analyzer_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/komapikoxupamazev.pdfIn PDF document text
    • http://darafefe.rf.gd/50858035683.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/podewamojufixadegobojep.pdfIn PDF document text
    • http://dilutibu.onlinewebshop.net/notorixaref.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/samsung_top_load_washer_error_codes_8c.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_off00010820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10820 4844 bytes
SHA-256: f7f84560b3626ebbc40670fdba406abb3323deeeedc799f93bc7e8db9656aeba
font_01_sfnt_off0001185c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1185C 11060 bytes
SHA-256: 1d85824aee9f5d072e98be3b6e59c2403df5ef9f34a673f10609b4a66fc6403e
font_02_sfnt_off00013df4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DF4 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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