Malicious PDF — malware analysis report

Static analysis result for SHA-256 073d141a0f4a5865…

MALICIOUS

PDF

67.1 KB Created: 2021-02-18 02:08:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 5c27cff9f3cec8664c7a09156b12bb35 SHA-1: 6fe7c91896438a77337df457fc7a5113bb616287 SHA-256: 073d141a0f4a586525338b73740a8675a24b70db80ed6e8e92982286f19c7923
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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/wix?keyword=a+more+perfect+union+activity+worksheet+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4416798/normal_6029fe6fe4628.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481520/normal_5fe462dbe02d7.pdfIn PDF document text
    • http://bolagafub.iblogger.org/what_is_median_per_capita_income.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414174/normal_60174547d3d18.pdfIn PDF document text
    • http://buviturowugigew.66ghz.com/mavagesiji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475194/normal_5fe9cdbda3764.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366949/normal_6028a652ccbbc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423752/normal_5fd91624b9b77.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
    • http://lufafutogixafu.rf.gd/40953332332.pdfIn PDF document text
    • http://lekowezitodog.rf.gd/61013576974.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/tuvemekomom.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/facebook_first_year_stock_performance.pdfIn PDF document text
    • http://nofugodevi.rf.gd/apologia_physical_science_module_11_test_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/facebook_photo_album_from_group.pdfIn PDF document text
    • http://tasodeporojunez.epizy.com/sisen.pdfIn PDF document text
    • http://morisexisaxewa.epizy.com/54401239183.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/python_bottle_form_example.pdfIn PDF document text
    • http://biligisagazo.epizy.com/kekitezapebaw.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/51603531915.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_off0000bcb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCB7 5412 bytes
SHA-256: 6b74af08aa1b1c2baf5a9af2fc86811b30d7f5834da45a7bba5b3c375b4120a6
font_01_sfnt_off0000cf0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF0C 9952 bytes
SHA-256: 83aca0c797e856595dfe657e7753db5381d6b7385c9c3293b1391af758526a1f
font_02_sfnt_off0000f0e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E1 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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