Malicious PDF — malware analysis report

Static analysis result for SHA-256 e527d8f74b16462c…

MALICIOUS

PDF

79.7 KB Created: 2021-05-18 21:03:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e94dcbe7bc8ced575529f3948b74c488 SHA-1: 11746c4156fadbff8bfbbc9461cbcfdf7e0c7cb8 SHA-256: e527d8f74b16462ccc239bfaed7dcf63b652791eafffbdf84213c4025f1ce3d7
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://mezovuduw.ru/strik?utm_term=why+is+my+roomba+blinking+orange PDF link annotation
    • https://rejobasagiletez.weebly.com/uploads/1/3/4/6/134642313/3000123.pdfIn PDF document text
    • https://wefikugozakilo.weebly.com/uploads/1/3/1/0/131069992/31e6ef3df702.pdfIn PDF document text
    • http://zofugam.iblogger.org/does_tris_actually_die_in_insurgent.pdfIn PDF document text
    • https://vituxusupodewe.weebly.com/uploads/1/3/1/3/131379836/4655308.pdfIn PDF document text
    • https://wurilulisewanid.weebly.com/uploads/1/3/4/7/134728532/danidamutodil-bezom.pdfIn PDF document text
    • https://lotijilakoda.weebly.com/uploads/1/3/4/4/134468432/3097099.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/jazuravazaguz/technical_support_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/84272840597.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1814850-e64a-4e0e-aa9c-f2c1f3c77a63/adobe_illustrator_classroom_in_a_book_2020_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/sugiwafuvagemuxo.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/29119695286.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc3902ca-d770-438a-93bd-6c446b32b6bf/jukilalanapidugumi.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/dixawivatumulolafunod.pdfIn PDF document text
    • https://s3.amazonaws.com/kukazowox/android_aosp_keyboard_vs_gboard.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/everlane_size_guide_australia.pdfIn PDF document text
    • http://jimatisejur.rf.gd/2012_jeep_grand_cherokee_for_sale_ontario.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/love_yourself_easy_piano_sheet_music.pdfIn PDF document text
    • http://nasujaguza.epizy.com/sirewuzalobu.pdfIn PDF document text
    • https://s3.amazonaws.com/wurivuve/cybex_550t_treadmill_manual.pdfIn PDF document text
    • http://rutafexiloji.rf.gd/engine_bearing_failure_analysis.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB3 5124 bytes
SHA-256: cbaba3b608c89bf8c78195a60c20ee1eb2265d25f0e1ff50b3052229af15b28e
font_01_sfnt_off0000fcf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF8 10820 bytes
SHA-256: dd5efd5514fe0030c7cd2981bf2f45b7afa770e6655d8c52c2013972f2978977
font_02_sfnt_off000121b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121B7 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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