Malicious PDF — malware analysis report

Static analysis result for SHA-256 b17064bfe0d3a36d…

MALICIOUS

PDF

79.3 KB Created: 2021-04-12 00:42:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 17d24d74ba2acc6e34dbf63753b18c29 SHA-1: 9de4bbad4aab2d6d862a58464eb137eb1974265d SHA-256: b17064bfe0d3a36d363f9ef6e7daab83e203dd83162d893d5a5879b03a5baae9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable hosting and are designed as link farms, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, appears to be a lure related to 'software development process models PDF'. No scripts were extracted, but the PDF structure and embedded URIs strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/strik?utm_term=software+development+process+models+pdf PDF link annotation
    • http://xupulakikovuxo.mypressonline.com/tukijasekefuva.pdfIn PDF document text
    • http://vuvulusigi.scienceontheweb.net/jafizupaxa.pdfIn PDF document text
    • https://cdn.sqhk.co/duwenaxiseve/jbjfqge/97590531682.pdfIn PDF document text
    • http://wotaxatumumodok.sportsontheweb.net/augusto_comte_biografia.pdfIn PDF document text
    • https://cdn.sqhk.co/sedazozesufu/ihidjgu/throne_of_bloodstone_5e.pdfIn PDF document text
    • http://falogexeraku.22web.org/rofirik.pdfIn PDF document text
    • http://sefegusekepuxa.mypressonline.com/secrets_aleatha_romig.pdfIn PDF document text
    • http://kejurudoji.medianewsonline.com/11155218575.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f6e0996-c259-4e4f-81f0-bd704d62c654/what_are_the_seven_gods_of_mesopotamia.pdfIn PDF document text
    • http://petojijoxura.onlinewebshop.net/rokaxisad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a24af41e-4eb7-4346-99a0-492c3822cba8/zizumevoxerotamenutesowug.pdfIn PDF document text
    • http://satogitexuvo.myartsonline.com/16754041953.pdfIn PDF document text
    • http://sabukizazuse.epizy.com/quran_arabic_malayalam_translation_free_download.pdfIn PDF document text
    • http://koriwironawuva.myartsonline.com/cracking_the_pm_interview_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/080a416a-bc5b-440f-86e0-257bfc92ad43/22278232360.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29880242-bee4-4401-840e-106947d5255c/takivupefanopibatirop.pdfIn PDF document text
    • http://lizelonuzabixek.epizy.com/disney_plus_not_working_on_samsung_smart_tv_may_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afc4915c-f929-470f-8044-8d0182e1752b/33292044614.pdfIn PDF document text
    • http://gexokaxaxitinug.rf.gd/ielts_writing_task_2_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ecc5c6f-5b31-4742-837f-caaf6c7ab22f/is_diablo_3_on_switch_local_multiplayer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f3cf16e-3a40-4102-b0a4-8450d4bd784e/mobiwokosabovusunexunet.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_off0000f97f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF97F 5556 bytes
SHA-256: 51128741a3404a691c842abe8f401f4896ba67e3c1a7963b19f11444f9f8cb62
font_01_sfnt_off00010c6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C6D 10420 bytes
SHA-256: ddfebcfa5961ba187dd51b014ebd79b4e7ede6f32129342d068d38b5a3610f35

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