Malicious PDF — malware analysis report

Static analysis result for SHA-256 614fa72c151dbabf…

MALICIOUS

PDF

78.7 KB Created: 2021-03-13 16:35:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: d1d2649a20eb4b6216742018aaed61a5 SHA-1: 7c46a2969793d2211cd8c607d92019043a8757a9 SHA-256: 614fa72c151dbabf2e3c4742aba325e5f1571566e57289c8133aef6a4b5b5c3d
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' containing 30 links. One of these links, 'https://xezojetit.ru/aws?utm_term=it%2527s+not+summer+without+you+jenny+han+summary', is flagged as unknown reputation and is likely the primary malicious destination. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/aws?utm_term=it%2527s+not+summer+without+you+jenny+han+summary PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4389361/normal_601b00ecf0711.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475397/normal_5ff4683061592.pdfIn PDF document text
    • https://muxoramosuzuveg.weebly.com/uploads/1/3/4/2/134266249/b05000829d455.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459774/normal_5fcb08bd1765f.pdfIn PDF document text
    • https://vupagivoro.weebly.com/uploads/1/3/4/3/134314863/4101470.pdfIn PDF document text
    • https://wafiludelo.weebly.com/uploads/1/3/1/4/131437380/5226358.pdfIn PDF document text
    • https://cdn.sqhk.co/figegixo/fuV60Lq/93427565835.pdfIn PDF document text
    • https://cdn.sqhk.co/jagapifa/hjebijm/worldcraft_block_craft_mini_world_3d.pdfIn PDF document text
    • https://xexijawabipej.weebly.com/uploads/1/3/4/3/134317257/1552404.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/luxelula/samumeradujasu.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/logitech_h800_how_long_to_charge.pdfIn PDF document text
    • http://rereroma.epizy.com/89860866586.pdfIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/tewigudedufeb.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/debt_calculator_spreadsheet_free.pdfIn PDF document text
    • http://mowumaja.epizy.com/54589633585.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/nawizinafolukejebufunos.pdfIn PDF document text
    • http://wilixafex.epizy.com/87919059858.pdfIn PDF document text
    • http://ligumawi.epizy.com/b._ed_entrance_exam_form_2019_uttarakhand.pdfIn PDF document text
    • https://s3.amazonaws.com/gatazeromij/fluent_design_web_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/nhmrc_2003_dietary_guidelines_for_australian_adults.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/vevinedidipu.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_off0000f6d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D3 5132 bytes
SHA-256: a355ed38e82e159e7b253e3a88ed2880629c0152b4fe713c3baf781e7b634f4d
font_01_sfnt_off00010833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10833 10932 bytes
SHA-256: 24cda4fdf1c57bd4b6670610892f92daf606ff3ab1cb04e5d13167edc47e5f57

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