Malicious PDF — malware analysis report

Static analysis result for SHA-256 8df34e32cf6b6e60…

MALICIOUS

PDF

93.6 KB Created: 2021-01-23 17:15:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a8efe51b5c4999fb80bf38cff43bba0c SHA-1: de80e6c7f1b1528a598dd9598b57a68a39ad773e SHA-256: 8df34e32cf6b6e60667f102fbfbf1474bf65dd1bd4d2c36662cdfc5f1041ee2f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, many pointing to PDF files hosted on platforms like Weebly and s123-cdn-static.com. The primary purpose appears to be link farming or distributing a large volume of content, potentially for SEO manipulation or to host malicious payloads. No scripts were extracted from this sample.

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 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.
  • 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://trafficel.ru/aws?utm_term=characteristics+of+a+research+topic+pdf PDF link annotation
    • https://gidunixodon.weebly.com/uploads/1/3/5/3/135322071/279877.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387229/normal_5ff918e2e8184.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454544/normal_6003adc618dca.pdfIn PDF document text
    • https://tigelulipuneve.weebly.com/uploads/1/3/4/7/134746657/5064903.pdfIn PDF document text
    • https://bimipesetasezi.weebly.com/uploads/1/3/4/0/134017520/tarufavaxosux_tarujonovimap_numegaxivojo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418185/normal_6002550853ce9.pdfIn PDF document text
    • https://cdn.sqhk.co/dediwifime/heggxia/35288408889.pdfIn PDF document text
    • https://cdn.sqhk.co/tefebenum/7hbja90/sonic_adventure_2_chao_garden_green_fruit.pdfIn PDF document text
    • https://nivunosanogerog.weebly.com/uploads/1/3/4/5/134516177/f0c70.pdfIn PDF document text
    • https://tagudosalanuku.weebly.com/uploads/1/3/1/4/131452811/585a617d7a6490.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489599/normal_5fc9a33036990.pdfIn PDF document text
    • https://vopupina.weebly.com/uploads/1/3/1/0/131070761/wosuveb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474985/normal_5fd120bf915f2.pdfIn PDF document text
    • https://vetinuvejozijuk.weebly.com/uploads/1/3/4/7/134745319/xedakusafuwedanuzuz.pdfIn PDF document text
    • https://dukopovofozevi.weebly.com/uploads/1/3/5/2/135295758/wobesofetobo-goloder-kawop-gewebebe.pdfIn PDF document text
    • https://ralixuviromod.weebly.com/uploads/1/3/5/3/135345966/finuxivib.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365655/normal_5fedd94867ebf.pdfIn PDF document text
    • https://cdn.sqhk.co/likunubiba/pggNYgd/vulexawis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448129/normal_5fea3f180f061.pdfIn PDF document text
    • https://babotiditufo.weebly.com/uploads/1/3/4/6/134694550/1720951.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377912/normal_5fd13a730dff0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000124e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124E5 4916 bytes
SHA-256: 7d9250f244408f49fd53cc15eff37e790d8f18406e7f4448e537b0b354c253d2
font_01_sfnt_off000135b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135B2 10940 bytes
SHA-256: 4bc48f86f195479955e5c19bd9d28077f30186d0a2fcf0fbb4fdf31de7630b58
font_02_sfnt_off00015adc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15ADC 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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