Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6648b8c43474bda…

MALICIOUS

PDF

76.2 KB Created: 2021-04-03 21:11:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 586f4383076b59e192e8b4856aea5cb5 SHA-1: ead1fed42d83798d1ce43dada108477315d9c1d5 SHA-256: b6648b8c43474bda2dc600f9c97f26d32c316ad6a182fceafd07cf61a9b1d9c7
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many pointing to other PDF files, suggesting a link farm or redirection mechanism. The document body, though partially corrupted, contains text related to printer installation, which is likely a lure to direct users to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/strik?utm_term=how+to+install+hp+deskjet+2132
    • https://static.s123-cdn-static.com/uploads/4451217/normal_6005b8342cb91.pdf
    • https://static.s123-cdn-static.com/uploads/4407813/normal_5fef4b12ba8af.pdf
    • http://zuviwadakaji.22web.org/babinet_compensator_experiment.pdf
    • https://bejivuvepezera.weebly.com/uploads/1/3/4/4/134437422/nazejugo-lifado-pesovalad-voxiragevoxu.pdf
    • https://funapimezu.weebly.com/uploads/1/3/1/0/131070883/gefokurigumanos.pdf
    • https://cdn-cms.f-static.net/uploads/4469136/normal_605c09d92ade3.pdf
    • http://disclosures.space/82299234436cgixt.pdf
    • http://electrumwallet.buzz/ibps_po_main_exam_syllabusrcf9q.pdf
    • https://murafasonuralab.weebly.com/uploads/1/3/5/3/135398902/wavukav.pdf
    • https://static.s123-cdn-static.com/uploads/4463543/normal_5ff39d0c8a748.pdf
    • https://cdn-cms.f-static.net/uploads/4419424/normal_602f7b56adc29.pdf
    • http://famafivas.iblogger.org/8090298803.pdf
    • https://xorexataziz.weebly.com/uploads/1/3/4/4/134496469/vapoduz.pdf
    • http://kudopifupelixi.22web.org/tosejokotulajuxirikuvaf.pdf
    • http://luminar2-download.xyz/rosomadisofenabegizidi69bao.pdf
    • https://cdn-cms.f-static.net/uploads/4463005/normal_603fa67575626.pdf
    • http://zogixobanifowi.22web.org/cernuda_ocnos.pdf
    • https://static.s123-cdn-static.com/uploads/4450440/normal_5fe0c3fd5fe41.pdf
    • https://static.s123-cdn-static.com/uploads/4366031/normal_6008c6aa782b8.pdf
    • https://static.s123-cdn-static.com/uploads/4499300/normal_5fc9be6c44faf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tamupevex.rf.gd/50800950051.pdf
    • http://metusajixano.epizy.com/1953437993.pdf
    • http://vinetewexe.epizy.com/project_storyboard_template.pdf
    • http://wemazepiba.epizy.com/hrsa_uds_progress_report.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed8a.bin
454602cf56f9a7e633533a3aacf7151da915a33da9780a03f2105243a9881289		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED8A 5492 bytes
font_01_sfnt_off00010052.bin
adf336e4188576979b514384b1d8606190364c52bfd77977fc9f0df4e361b9a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10052 10320 bytes

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