Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cb994e8e025d52f…

MALICIOUS

PDF

82.2 KB Created: 2021-04-24 04:16:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 50b492d6d31bf0dceb0cf2b24f7566c9 SHA-1: 99dabde0caa24cbf1c2d1b850f89ea03bd144b92 SHA-256: 0cb994e8e025d52f019fc7b6813ba9f1ae1a671c6e848162205d561428c884cb
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://botokaw.ru/strik?utm_term=scansnap+s1500+driver PDF link annotation
    • https://jufozawuvinuxak.weebly.com/uploads/1/3/5/3/135326647/vujusijisumikar.pdfIn PDF document text
    • https://xikunozazoteta.weebly.com/uploads/1/3/1/4/131453294/5320064.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
    • https://4095172d-bd2f-4181-91d7-dd424e653400.filesusr.com/ugd/df73ab_8c3ca2d935c341a490d850467cfaa057.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a3b264e-9664-4996-9faa-af4d91f6137f/59444372737.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e8e3eb8-192b-4896-89d0-dda59394677b/rulotilibibipejoxozib.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/vitamix_e320_costco_in_store.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/tipos_de_graficos.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/malaria_in_pregnancy_ppt_free.pdfIn PDF document text
    • http://radawewivilu.epizy.com/what_are_the_most_valuable_spiderman_comics.pdfIn PDF document text
    • http://gizimup.epizy.com/moxofijabu.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/pufipowixawupoxemu.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/nevemufenomo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4b46495-4b02-4413-b154-c10939885431/martin_heidegger_the_origin_of_the_work_of_art_summary.pdfIn PDF document text
    • https://5984e891-aecd-43e6-866f-efdb297c9c35.filesusr.com/ugd/403565_e6e5563c985e422b8c40ad35a965f538.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kotodur/16619302938.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/figijuxifel.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f53e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF53E 5116 bytes
SHA-256: d6c599fcc51d96ba61b157b1df44ee705bd949f7bc361d7c37c60a6b7cfd7ccc
font_01_sfnt_off000106a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A0 11116 bytes
SHA-256: a21ec806c522be54f33e500f1b6110933e8a008434fa34224a784a4b85892bd7
font_02_sfnt_off00012cc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC3 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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