Malicious PDF — malware analysis report

Static analysis result for SHA-256 6013e5624ab6acfb…

MALICIOUS

PDF

77.6 KB Created: 2021-04-29 07:18:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 4c3e65e4ab48a53007b5a2c94f25e66c SHA-1: a20423b0e18bcc49c66eaab7d23333d8d61377e9 SHA-256: 6013e5624ab6acfbd70c00c1b627c88e387fd4231decd1e3156be62d372336d1
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and is flagged by multiple heuristics as malicious, including a ML classifier and ClamAV detection. The document body, though heavily obfuscated, contains text that appears to be a lure for a search engine query, directing the user to a suspicious domain. The presence of numerous external URIs and link farm indicators suggests a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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://maypoin.ru/strik?utm_term=what+does+it+mean+to+dream+about+big+black+ants PDF link annotation
    • http://fuzubijixulux.mygamesonline.org/rixigokatopudurakineviw.pdfIn PDF document text
    • http://dugikilosikilo.22web.org/business_english_telephone_conversation.pdfIn PDF document text
    • http://xofelivigavas.mywebcommunity.org/skin_cancer_information.pdfIn PDF document text
    • http://memisada.mygamesonline.org/audyt_wewntrzny._teoria_i_zastosowanie.pdfIn PDF document text
    • http://pofaduxiruk.getenjoyment.net/70591740451.pdfIn PDF document text
    • http://zutalinezar.iblogger.org/what_is_ethics_and_integrity.pdfIn PDF document text
    • http://fiziwafofekaku.mygamesonline.org/b._com_2nd_year_books_free_download.pdfIn PDF document text
    • http://novijixonusasu.mywebcommunity.org/grammar_activities_for_high_school.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e39bfc17-a898-4016-ac91-fc9303c112df.filesusr.com/ugd/b5068a_a68b7925571c4c759b07bfb0477bdff4.pdf?index=trueIn PDF document text
    • http://nutogexutal.rf.gd/xirenetovenikukuv.pdfIn PDF document text
    • https://05282879-aed3-4f16-ac14-d534add4d4bd.filesusr.com/ugd/0f8b7c_750b9333dfb44bd5874dafecb4857c6e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/518c0087-d7ca-4e0d-9df2-1b3ac215309e/hec_hms_user_manual_4.3.pdfIn PDF document text
    • https://d650f791-4ca6-4964-96f1-ba9fac0414c1.filesusr.com/ugd/adf9cb_f15def38fe5241488a6d199eaa9a8dff.pdf?index=trueIn PDF document text
    • http://jimogorop.rf.gd/basic_chess_openings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dbb3dd9-cbb8-488b-bb1a-d855e40b4ceb/do_portable_air_conditioner_leak_water.pdfIn PDF document text
    • http://gakilasefit.myartsonline.com/94837233820.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa8e80d2-16b4-49e2-87e8-288bffef48e3/28863572590.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25738034-afff-4f06-8508-cdaa05ca3ea9/mcsa_windows_server_2016_study_guide.pdfIn PDF document text
    • http://xolavozezimodan.onlinewebshop.net/mulonejisoduxanafowobozun.pdfIn PDF document text
    • http://fedonefekipide.myartsonline.com/captivating_stasi_eldredge.pdfIn PDF document text
    • http://wenulusevikofa.myartsonline.com/botaxozijerina.pdfIn PDF document text
    • https://ecfc1f44-6648-4072-bff5-6ee4adcfbe4f.filesusr.com/ugd/e5a943_9f9b4956c2b046ecaf8c5e4f1fc670a9.pdf?index=trueIn PDF document text
    • https://ec75ba9f-29a7-4b73-bb51-4c951d20089f.filesusr.com/ugd/17cde0_94fe61019b61490ba97522858408bde1.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF008 5568 bytes
SHA-256: 7cf0711e301e17b861e8abb0530c60f15487505d5ee8ed927adf77b5aa5f2709
font_01_sfnt_off000102d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D9 11244 bytes
SHA-256: b3a98ca739c069de3d52d4f2856fa98c9835a395fbf96fab972205f18a1da333