Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ef1eda7565c4677…

MALICIOUS

PDF

75.5 KB Created: 2021-03-13 20:21:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 6d6b836d06c285a3b1f8d1b15a542177 SHA-1: 2acf6511312262d030a432ed0ec1fdca57f4234a SHA-256: 5ef1eda7565c46778e2d9e435d7b6f6227e98bd24e624bdae87f6d26e4e3a8e1
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The presence of a large number of external links, many pointing to PDF files, suggests a link farm or phishing attempt. While no scripts were explicitly extracted, the PDF structure and external link farm indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://gimoguvi.ru/strik?utm_term=how+to+use+a+stanley+air+compressor PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4386828/normal_5fddd20ba16a5.pdfIn PDF document text
    • https://notilapixoto.weebly.com/uploads/1/3/4/3/134397855/7284182.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461245/normal_603343c02cd86.pdfIn PDF document text
    • http://levojefozaloro.mywebcommunity.org/ancient_greek_history.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449629/normal_5fef38d8775e5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384323/normal_5ffaaa89a3067.pdfIn PDF document text
    • http://moxilekulina.getenjoyment.net/ronuvipilimefobilabusi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370074/normal_600ae7da5946e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470532/normal_5ff3c64cae578.pdfIn PDF document text
    • https://jabakatuni.weebly.com/uploads/1/3/1/0/131071057/c4c3e8092a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428342/normal_602c12ede11a1.pdfIn PDF document text
    • https://welavomuwaj.weebly.com/uploads/1/3/4/6/134633166/5d06bbb604d49f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464065/normal_602fea663bc1c.pdfIn PDF document text
    • http://fijazubelanulek.mywebcommunity.org/american_english_file_2_workbook_gratis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418973/normal_5fd132360cfb6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488574/normal_5fc6d0ba921f8.pdfIn PDF document text
    • https://cdn.sqhk.co/posebozej/QR8OhhH/dungeon_maker_wiki_story_mode.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481528/normal_6023f336c25b7.pdfIn PDF document text
    • https://cdn.sqhk.co/dedogupazib/LyijA0Q/heroes_charge_mod_2020.pdfIn PDF document text
    • https://nagiwudulowep.weebly.com/uploads/1/3/0/7/130775657/43474d9176e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450248/normal_602900225b73d.pdfIn PDF document text
    • https://nugakowizadofo.weebly.com/uploads/1/3/0/7/130738823/fesivoxodepivuve.pdfIn PDF document text
    • https://cdn.sqhk.co/dijabidasu/idjdX2G/venmo_to_bank_account.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xemigososefof.atwebpages.com/coleman_hot_tub_error_message.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_off0000e863.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE863 5232 bytes
SHA-256: 0f1353b72db33eca9ef9a39e2379d8fdaa8a0f58f582cd0a8005372b70cafd32
font_01_sfnt_off0000fa30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA30 11280 bytes
SHA-256: c9c3c4e81a919eb21c27cdf9ff03364a0a7d78a44d0d6ee646c4fb8411f70d4b

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