Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccd83b76db91a2b2…

MALICIOUS

PDF

72.3 KB Created: 2021-02-16 02:22:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 056d47cb449709b8aaa6f85bda4f87c2 SHA-1: 03b6457c2996e81e3acbdeebb21e6c062ebb3f57 SHA-256: ccd83b76db91a2b20da31e72c56f3343450fec6ed02c736f8fc1d288fa64487d
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/strik?utm_term=ryobi+bts10+rip+fence'. This indicates the document is designed to redirect users to a malicious site, likely for phishing or malware distribution. The presence of multiple unknown URLs further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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/strik?utm_term=ryobi+bts10+rip+fence In PDF document text
    • http://kokijejon.22web.org/kindergarten_english_worksheets_nsw.pdfIn PDF document text
    • http://sakhavto.ru/manual_de_activismo_politico_prildlow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426549/normal_6019c6cd84a70.pdfIn PDF document text
    • http://indital.fun/printable_graph_paper_1_4t9cgc.pdfIn PDF document text
    • http://closemaze.com/the_oresteiawmt65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410222/normal_601d2790ae10e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402949/normal_601144e01ec5c.pdfIn PDF document text
    • http://24goodstore.site/fojuwgzply.pdfIn PDF document text
    • http://netzamka.ru/magupsyb7j.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380411/normal_601c5bc3bffc0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404523/normal_602695bc8e427.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pukiza/6540430683.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/41511282603.pdfIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/alkene_formation_oxidation.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/26891729841.pdfIn PDF document text
    • http://xulufavuso.rf.gd/love_couple_photos_full_hd.pdfIn PDF document text
    • http://bapibalapu.rf.gd/solidworks_free_32_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/aarti_songs_tamil.pdfIn PDF document text
    • http://bibobega.epizy.com/propaganda_techniques_worksheets_high_school.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/finding_the_volume_of_cuboids_ks2_worksheet.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_off0000db16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB16 5208 bytes
SHA-256: 0d303a12e7360faa48e7aed358a538a29eb479e3971eb510b5d1fb4f1513782c
font_01_sfnt_off0000ecf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF5 11140 bytes
SHA-256: a302126cff1c9e85ccebb4da0c26065a65fbbf700eda399faa5b0a622fa63416

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