Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c62c6a47e830e21…

MALICIOUS

PDF

83.8 KB Created: 2021-01-27 17:42:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 052b1b4b29cd0babed4233197ada1328 SHA-1: b7d7b2e7f6aa598afc71e93b5968c18138dd01c9 SHA-256: 1c62c6a47e830e218f48070da820ca8dc0e1c0e74d60d5c907518b41b1cfb6c0
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with a primary focus on directing users to a link that appears to be a phishing attempt related to 'Phd full form in hindi'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for multiple distinct hosts, suggesting an effort to evade detection. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://maypoin.ru/123?utm_term=phd+full+form+in+hindi PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4492575/normal_5fce6913c9aa6.pdfIn PDF document text
    • http://velesvoyage.ru/bafesupi3injl.pdfIn PDF document text
    • http://jalogeteka.iblogger.org/futura_bold_font_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445321/normal_6009c1ecb9bb1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444374/normal_5fcd29d87ec91.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/icfJjbm/ringtones_for_iphone_5s_free_download.pdfIn PDF document text
    • https://japafapu.weebly.com/uploads/1/3/1/4/131437770/xoporaminegomak-vuxawefenejat-jujomugotawuwu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385230/normal_6003ea94a08f4.pdfIn PDF document text
    • https://sejesomizibiji.weebly.com/uploads/1/3/5/3/135346687/3546fc6aa1d.pdfIn PDF document text
    • http://lofitner.buzz/free_eisenhower_matrix_template_excelzu2ie.pdfIn PDF document text
    • https://cdn.sqhk.co/zeliravepuj/jijjicC/45768046653.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480585/normal_5ff357455e209.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/gifiz/56396052012.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/andy_free_filehippo.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/dotowulijiseg.pdfIn PDF document text
    • http://wudafozejuniv.rf.gd/mopamerovisuvasotowuzol.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC0 4760 bytes
SHA-256: 4b2937c030654cdb88208570e280a882d27f4850493377c3aa6d4c3c52112b27
font_01_sfnt_off0000fcbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCBE 3720 bytes
SHA-256: 6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed
font_02_sfnt_off00010821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10821 11484 bytes
SHA-256: 52c651d4412e00a596da902823f603a15434a622ca7be7b512061a729b2584e4
font_03_sfnt_off00012d93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D93 5464 bytes
SHA-256: 9e08d0c9d8b40c5ddff7729df070c267cf9b6126ce48cf41152de64e2525ede5

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