Malicious PDF — malware analysis report

Static analysis result for SHA-256 3355b2edf78d6a49…

MALICIOUS

PDF

105.6 KB Created: 2021-04-20 18:14:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 214b4f511f2c4c2223681fc9b5fedeb0 SHA-1: e7ef705e2cc01a7a0b935850290b6d73c68f3522 SHA-256: 3355b2edf78d6a49bab6ddc3181e2e1c57674bda8942727da95eba47177ac2f9
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or phishing attempt. The primary URL 'https://resalured.ru/strik' is likely part of this campaign. While no scripts were explicitly extracted, the PDF structure and numerous external links indicate a malicious intent to redirect users to potentially harmful content, possibly for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://resalured.ru/strik?utm_term=how+do+you+open+a+sentry+safe+with+the+key+only PDF link annotation
    • https://xasedomag.weebly.com/uploads/1/3/1/0/131071243/feguf.pdfIn PDF document text
    • https://vororesefuvemux.weebly.com/uploads/1/3/0/8/130813496/mabusosifirunu_kokip_samejepipota.pdfIn PDF document text
    • https://lizatupapej.weebly.com/uploads/1/3/4/4/134401074/fokoj_raxawurekemof_wofamifepire_sigofisilab.pdfIn PDF document text
    • https://tifutijije.weebly.com/uploads/1/3/2/6/132682998/19f481b5a.pdfIn PDF document text
    • https://todusoxi.weebly.com/uploads/1/3/3/9/133999566/tavolegerikite-xugupagux-lawisewaludub-patoxolebomi.pdfIn PDF document text
    • https://xoxitugupara.weebly.com/uploads/1/3/1/3/131383959/padewozewu.pdfIn PDF document text
    • https://wadezadoli.weebly.com/uploads/1/3/0/9/130970015/6265433.pdfIn PDF document text
    • https://fowedejuman.weebly.com/uploads/1/3/4/5/134518602/94e5ad8.pdfIn PDF document text
    • https://sakiverore.weebly.com/uploads/1/3/6/0/136095660/5165515.pdfIn PDF document text
    • https://xiwikufebalub.weebly.com/uploads/1/3/1/4/131438050/94f4ffcab690f.pdfIn PDF document text
    • https://zadivodewereb.weebly.com/uploads/1/3/2/6/132683121/8dde38f0e.pdfIn PDF document text
    • https://sejuxotanodefif.weebly.com/uploads/1/3/5/9/135957191/boradibagisiximoji.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/dezajok/takafirevoxilejokov.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/22842628317.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/jay_z_decoded_cover_art.pdfIn PDF document text
    • https://s3.amazonaws.com/jizubisetebof/gazuwusonibuvaniwuj.pdfIn PDF document text
    • https://6ba7316d-b84b-4ccb-a32a-103c856d4013.filesusr.com/ugd/91f37e_eaad3d91e3c34d548c874e2f60e650e0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/liguwubore/convert_image_to_drawing_app.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/do_the_witcher_games_spoil_the_books.pdfIn PDF document text
    • https://f72b89be-0fa6-41ee-8162-331329ef78ce.filesusr.com/ugd/95089d_c834b11d71264233877eacfc46dfbd02.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/76533635850.pdfIn PDF document text
    • https://8767aa75-4bd5-48c0-94ca-24e983238001.filesusr.com/ugd/debdc1_797d407f94df4fa6888cb4ad1ed5c95d.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6B 13896 bytes
SHA-256: a491d1b9d4ed097776246831689eb0053c0225e91d2a842310137bc4952ce0c2
font_01_sfnt_off000127a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127A4 5232 bytes
SHA-256: 63b89ae68990e24902626179914573bcd3f64abcb2f707f8aa437811e7411cb1
font_02_sfnt_off0001396d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1396D 3192 bytes
SHA-256: bd4b7a0684c6fcffbaea98df90dc676aa9acc9f5efc8fd393d277e0d97658f96
font_03_sfnt_off00014589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14589 12332 bytes
SHA-256: 9ef23249ba522d323ceffd8864484d25ad2ec75a15de9c2a4bbca3f72c2df259
font_04_sfnt_off00016ef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16EF9 17716 bytes
SHA-256: c7b2ea9681025b50280a9ca28e332b74faaee89eac50469a12005d6578ea6f4c
font_05_sfnt_off00018938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18938 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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