Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd897da27013d6dc…

MALICIOUS

PDF

83.9 KB Created: 2021-05-10 17:08:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 9b94a56511cc60ad5dba2c4ce9dd1870 SHA-1: 4b7ebc1a43cebbf747c15279acb6319bc221cee5 SHA-256: dd897da27013d6dc3485494d29ca49b23104a6231249f305ae6c37a9ebf4702b
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique often used for SEO farms or phishing campaigns. ClamAV and ML classifiers strongly indicate maliciousness, specifically flagging it as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/strik?utm_term=what+is+the+average+man%2527s+arm+size PDF link annotation
    • https://wixexiwe.weebly.com/uploads/1/3/5/3/135316610/degazezepijow.pdfIn PDF document text
    • https://takewinedol.weebly.com/uploads/1/3/4/7/134768260/konika.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445325/normal_5fcbe35583e86.pdfIn PDF document text
    • https://lirisuvobuku.weebly.com/uploads/1/3/5/3/135399047/5997e9e7.pdfIn PDF document text
    • https://wugizagopa.weebly.com/uploads/1/3/5/3/135311922/e56cb7eef621.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369783/normal_5fd23009db2c0.pdfIn PDF document text
    • https://ruxibudowivuk.weebly.com/uploads/1/3/4/7/134728491/9742317.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485576/normal_601d4f098d6d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408001/normal_5fcf206c3e1ef.pdfIn PDF document text
    • https://rinotawobuv.weebly.com/uploads/1/3/4/7/134768279/nusujisuwow_titex_levifademuxi_jemapas.pdfIn PDF document text
    • https://puwibovur.weebly.com/uploads/1/3/4/6/134639487/dewanepanafuwu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413696/normal_60095f03be4ff.pdfIn PDF document text
    • https://sogatetemurus.weebly.com/uploads/1/3/4/3/134379625/954fa521.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/lupuvogotog/cyanogenmod_windows_installer.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/ncert_solutions_for_class_10_physics_chapter_12_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/critical_c-_ops.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/gajajesuzuwakikakuwev.pdfIn PDF document text
    • https://s3.amazonaws.com/jigezilor/chip_avira_android_kostenlos.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/29552690994.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/nugivotokotozit.pdfIn PDF document text
    • http://muxajetolalet.epizy.com/fegotanijaziximu.pdfIn PDF document text
    • http://xukaneteris.epizy.com/schools_financial_benchmarking_report_card.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_off000109ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109BA 5224 bytes
SHA-256: 4bc44c474809bd254e80c49ce37a99411680353858e389f8f35c0558f67dca73
font_01_sfnt_off00011b76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B76 11420 bytes
SHA-256: 924b9c1f7e694c8342719071ed313f4c92b88ee3b96de51cdf29c3c195068635

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