Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ddd1f86758a4ae9…

MALICIOUS

PDF

114.9 KB Created: 2021-03-02 07:18:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: ed8a81ecc86f7e59a8c5e32f17520508 SHA-1: 9c884eeb4b8a4cf6ff69882941b975c8fd46aa20 SHA-256: 8ddd1f86758a4ae900ea1842da5e358ccd8b041d1785ccefc657cb319cb9417c
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://dafemum.ru/aws?utm_term=how+to+pair+sony+headphones+mdr-zx770bn In PDF document text
    • https://cdn.sqhk.co/bugabowozi/hgdaWGU/xuxufusiduzagusef.pdfIn PDF document text
    • http://arfeshome.com/how_to_unstick_a_furnace_pressure_switchteedy.pdfIn PDF document text
    • https://gitosupogule.weebly.com/uploads/1/3/2/7/132741155/9118c61f.pdfIn PDF document text
    • http://znohist.site/linutodadozuxugogor1qiwd.pdfIn PDF document text
    • http://prizinsta365.website/kik_finder_female_13p6i34.pdfIn PDF document text
    • http://newser.site/15204878441xeusy.pdfIn PDF document text
    • http://amsidisi.xyz/neterirudefem8o769.pdfIn PDF document text
    • http://robinmani.site/88585770080i87j1.pdfIn PDF document text
    • http://smeshnoykir.space/mathcad_descargar_gratisuks0s.pdfIn PDF document text
    • http://ourfanz.com/maytag_bravos_xl_washer_repaird5qnj.pdfIn PDF document text
    • https://tunoritusaw.weebly.com/uploads/1/3/5/3/135328070/5506880.pdfIn PDF document text
    • https://dufadijikog.weebly.com/uploads/1/3/5/3/135325035/4a36bd24b68721.pdfIn PDF document text
    • http://waneboto.66ghz.com/28878445193.pdfIn PDF document text
    • https://cdn.sqhk.co/dijabidasu/wegdgjn/96344661037.pdfIn PDF document text
    • http://naturaleone.space/sociological_perspective_of_religionfl7sv.pdfIn PDF document text
    • https://cdn.sqhk.co/lokutibu/8NhaASK/55271376625.pdfIn PDF document text
    • https://cdn.sqhk.co/xejudawadoni/VDiiy6l/weluxiv.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/fofeguj/campbell_biology_ninth_edition_online.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/gikazafawe.pdfIn PDF document text
    • http://ruxatavebokoj.epizy.com/98302795874.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/buyers_guide_sticker_paper.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/ugly_christmas_sweater_song.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_off00018285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18285 5832 bytes
SHA-256: 6e99225cadd273a0ae42c827d940bb45f622aab36df338450c9f94fb7843ed98
font_01_sfnt_off00019658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19658 11500 bytes
SHA-256: cd95587e6b39befbc46e77b2b0966580022be4fb86e93a8b53ae24a195264a5e

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