Malicious PDF — malware analysis report

Static analysis result for SHA-256 daea0de92846d7e8…

MALICIOUS

PDF

90.9 KB Created: 2021-06-10 04:15:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 8d2a78e54a46c4b58e76b8a759154f98 SHA-1: cf0b3fa648a11d06e018310bad787525dd8dff53 SHA-256: daea0de92846d7e8cdfe99d8616e24fd69bf495b4cdca07000ba719b1a7d5cc2
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://crysiq.ru/pbw?utm_term=tajweed+rules+in+english+pdf+free+download PDF link annotation
    • https://wugivata.weebly.com/uploads/1/3/4/8/134872137/bc63c9.pdfIn PDF document text
    • https://bobitakakafaze.weebly.com/uploads/1/3/5/2/135297082/f0cbf2e89c0a9b.pdfIn PDF document text
    • https://molipose.weebly.com/uploads/1/3/4/6/134644393/31d88d3.pdfIn PDF document text
    • https://sutowuvo.weebly.com/uploads/1/3/4/6/134685384/1744902.pdfIn PDF document text
    • https://vogemafebin.weebly.com/uploads/1/3/4/2/134235603/4565764.pdfIn PDF document text
    • https://sopazamiwurigu.weebly.com/uploads/1/3/4/3/134387891/e271944b2a37b2.pdfIn PDF document text
    • https://guvisine.weebly.com/uploads/1/3/4/5/134598756/libuxelifajufowe.pdfIn PDF document text
    • https://jidukuroji.weebly.com/uploads/1/3/4/0/134013204/9cc1021.pdfIn PDF document text
    • https://bizitaninajoki.weebly.com/uploads/1/3/5/3/135316521/dc68525.pdfIn PDF document text
    • https://lenudigibelap.weebly.com/uploads/1/3/7/4/137499492/33efe3462410c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c949e21-0dab-4a9a-a5a0-c00d064732eb/what_was_the_most_severe_thunderstorm.pdfIn PDF document text
    • http://xexufokug.pbworks.com/w/file/fetch/144802935/ejercicios_de_razones_trigonomtricas_recprocas_y_complementarias_doc.pdfIn PDF document text
    • http://vananizi.pbworks.com/f/how_to_get_mpl_mod_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/887f025e-83c4-4796-a39b-0e2005b1d752/gazovimenexevezoguwap.pdfIn PDF document text
    • http://litorabi.pbworks.com/w/file/fetch/144599655/29464080502.pdfIn PDF document text
    • http://xalomuzavege.pbworks.com/w/file/fetch/144586458/how_to_work_out_amps.pdfIn PDF document text
    • http://zewalar.pbworks.com/w/file/fetch/144473757/zevibo.pdfIn PDF document text
    • http://kizisoj.pbworks.com/w/file/fetch/144520716/.pdfIn PDF document text
    • http://zikasamu.pbworks.com/w/file/fetch/144708351/zuxosoduwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65b2ab10-0728-4f99-80f6-15c24a21a9b5/asp.net_mvc_5_download_for_visual_studio_2012.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5da1c77d-c9bd-4855-b6bd-f7fed2ba97e5/how_to_pronounce_the_international_phonetic_alphabet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fb2adc1-fff4-45c8-9edc-96a12e383714/70712171570.pdfIn PDF document text
    • http://wurutaw.pbworks.com/w/file/fetch/144713304/kalaman_soyayya_2020.pdfIn PDF document text
    • http://natofuke.pbworks.com/f/8948087230.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00013d59.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13D59 19012 bytes
SHA-256: 7eeabcf7eff4d94939c4ff2328700554f3b23b49e567f5348020ae961722da03
font_00_sfnt_off0000f004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF004 2952 bytes
SHA-256: 95d20003a5d1eabf6b01fdcb0789a00ec3dbf3a88d8f9cfb7f6903033e597c7c
font_01_sfnt_off0000fa81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA81 5420 bytes
SHA-256: 15909eb3f9f5ede722e5af011a9dc27b6ea8588ac63b3f076586750a9601a7ec
font_02_sfnt_off00010cf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF6 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_03_sfnt_off00011584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11584 11628 bytes
SHA-256: 006cfa93b2f398b2ffe74299254b4e54faf47cb44fc3258f63b8b062b2f4e56f

Open this report in the interactive analyzer, or submit your own file for analysis.