Malicious PDF — malware analysis report

Static analysis result for SHA-256 38d817707cee1102…

MALICIOUS

PDF

77.9 KB Created: 2021-03-04 14:17:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c5f15e8a74f08d577606014b0e2ad93a SHA-1: e5e07e75ecd3953f868a2825f9319552c4247e42 SHA-256: 38d817707cee110227ecfda91ac56269924fa60a86181b1da326b37f347a3790
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://druttle.ru/award?keyword=what+might+be+an+example+of+corporate+social+responsibility+apex PDF link annotation
    • https://nufapapezo.weebly.com/uploads/1/3/0/9/130969462/9797646.pdfIn PDF document text
    • http://neuroncraft.online/lagewilatemehk1p.pdfIn PDF document text
    • http://pushbiz.fun/measures_of_center_and_spread_worksheet_answersrwqo0.pdfIn PDF document text
    • https://barefofu.weebly.com/uploads/1/3/4/4/134492989/2461803.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489598/normal_5fdc8732c5520.pdfIn PDF document text
    • https://lofidebonejiniz.weebly.com/uploads/1/3/5/3/135334880/gunuze.pdfIn PDF document text
    • https://witaveju.weebly.com/uploads/1/3/1/4/131452735/269742.pdfIn PDF document text
    • https://minedikatew.weebly.com/uploads/1/3/0/7/130739540/motufenorofena.pdfIn PDF document text
    • http://adanakebap.org/app_for_pc_windows_10_free8nk5c.pdfIn PDF document text
    • https://rawunixu.weebly.com/uploads/1/3/4/5/134527334/1749185.pdfIn PDF document text
    • https://nunofisodopuw.weebly.com/uploads/1/3/4/2/134234763/7536493.pdfIn PDF document text
    • http://appless.space/fisher_wood_stove_instructions17nad.pdfIn PDF document text
    • https://kenuzoba.weebly.com/uploads/1/3/4/0/134017938/7716763.pdfIn PDF document text
    • https://japapetokanov.weebly.com/uploads/1/3/1/4/131454126/2418903.pdfIn PDF document text
    • http://legendnat.space/osmosis_and_diffusion_worksheet_middle_schoolhezef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467274/normal_5fcb7812565ba.pdfIn PDF document text
    • https://vobiromab.weebly.com/uploads/1/3/4/6/134653190/dilinin.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/gomaxod/avast_antivirus_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/74784659312.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/68132156378.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabisura/balam_pardesiya_movie_song.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/fairest_isle_purcell_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/36409906229.pdfIn PDF document text
    • https://s3.amazonaws.com/gupojakami/fipunotenugawu.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/warsaw_airport_map.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/fuluvotuvuparate.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_off0000f08d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08D 5752 bytes
SHA-256: dab6183324ef65eedf521b84a1dceb46ef115e74c3cad8e67c5f3916ac08277f
font_01_sfnt_off0001041a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1041A 10916 bytes
SHA-256: 89d0f11bb4308f83c8a1f5d397faf05c365d95731ef33f295687eb4cf2473bb1

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