Malicious PDF — malware analysis report

Static analysis result for SHA-256 17f4215c128e442f…

MALICIOUS

PDF

72.3 KB Created: 2021-03-27 09:52:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 322ed1d583ac6ead1e1049c1b18e527d SHA-1: 24073405de14e6439f59d06fba4faab09973b39b SHA-256: 17f4215c128e442ff308a9b700d17b5cd33fa3629d3124733636945a7e18d3fd
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. The document contains a large number of embedded URLs, forming a link farm, with the primary malicious URL being https://yafferge.ru/123?utm_term=pardesi+anthem+song+video. The presence of numerous links suggests an attempt to direct users to potentially harmful content or phishing sites.

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 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://yafferge.ru/123?utm_term=pardesi+anthem+song+video In PDF document text
    • https://cdn-cms.f-static.net/uploads/4454041/normal_600fda0f43c0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498882/normal_60385f85c0d90.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0029a690-d003-4268-bdc7-e74daa5a0415.filesusr.com/ugd/a4b355_f4ccba9ff231404bbf770237835d782b.pdf?index=trueIn PDF document text
    • https://c1f973cf-d719-4acb-8f9e-cd83ae4fb94d.filesusr.com/ugd/057766_dc2060ea24e7465c8ae0b1897dcc990e.pdf?index=trueIn PDF document text
    • https://ce099f17-eb12-430b-a452-8d789b3ee5a8.filesusr.com/ugd/aef5b7_f48638f99f5e4191a38ebfeafb398f61.pdf?index=trueIn PDF document text
    • https://80820154-e864-4b0c-832b-212b24169927.filesusr.com/ugd/c12414_7b9f8ee8f00a4120ba02bc51238744fd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/21311189902.pdfIn PDF document text
    • https://1628ddcf-e301-416d-9649-d9339b85441b.filesusr.com/ugd/0b1079_a405c5948ac641bb8201e0de16cc985e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kovilowab/axial_scx10_2_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/perimeter_and_area_worksheets_grade_5.pdfIn PDF document text
    • https://300a1258-3b13-45f7-80b9-bd8966f45320.filesusr.com/ugd/81888a_0ded11df86fb413d98013e48e9caaf49.pdf?index=trueIn PDF document text
    • https://ab737b70-891a-4a1f-8db9-ee548211cb31.filesusr.com/ugd/ce14f3_459b14a13b16468785eb2fd6573e5b48.pdf?index=trueIn PDF document text
    • https://ff743420-c5e2-4527-a456-70ddb2a1abd8.filesusr.com/ugd/5178f2_668d5af604474f30a3cee5607b2fea17.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/falejogajir/personality_plus_book_in_hindi_free_download.pdfIn PDF document text
    • https://083189c9-8220-4687-a375-57be19a37228.filesusr.com/ugd/909b15_923f85a6db444c4aa079d5563c0fa63e.pdf?index=trueIn PDF document text
    • https://56a79910-2d97-40e4-a1df-bca3b17021d7.filesusr.com/ugd/2721fc_f7f68447cbc34a93ac374bf7731fbc31.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/tinavovev.pdfIn PDF document text
    • https://s3.amazonaws.com/meludav/33508145544.pdfIn PDF document text
    • https://121f8fc1-d270-4171-a721-8ccd656fc20f.filesusr.com/ugd/2ca22b_76bc4addf2304fb2ba582747fe57efbf.pdf?index=trueIn 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_off0000dad4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD4 5268 bytes
SHA-256: 71875e0e982613ae05a4ae563f4e33b66261f1d7eb9089b0e0fa72fdf6f393de
font_01_sfnt_off0000ec9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9C 11624 bytes
SHA-256: 366610607cd1175948e83d869b296e6a2bca418d3aff3f296bbe9cab95958194

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