Malicious PDF — malware analysis report

Static analysis result for SHA-256 de98372fe6f06586…

MALICIOUS

PDF

90.6 KB Created: 2021-03-21 02:49:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 451a9dd315bf962ad743c48101543ccf SHA-1: a91769e2fe130e990665130cbe4e9ff6db104f57 SHA-256: de98372fe6f0658663819eb3e906896bb46696476a177e66d9683fb0e1cd719a
126 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 as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, pointing towards a phishing or malware distribution scheme. The embedded URL 'https://vilenefex.ru/strik?utm_term=old+testament+divorce+verses' is a primary indicator of the malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://vilenefex.ru/strik?utm_term=old+testament+divorce+verses PDF link annotation
    • https://cdn.sqhk.co/dokukavifig/gWjjja0/funaze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413693/normal_603e1a5d294db.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496592/normal_6006b36852456.pdfIn PDF document text
    • http://nabavawuzafurur.mygamesonline.org/prefix_and_suffix_worksheets_2nd_grade.pdfIn PDF document text
    • https://cdn.sqhk.co/kikolibub/8xRbuAV/interactive_ball_launcher_reviews.pdfIn PDF document text
    • http://waranijovuv.sportsontheweb.net/46791293128.pdfIn PDF document text
    • https://cdn.sqhk.co/sezelijimofi/IgiSifl/nfl_schedule_week_13_spreads.pdfIn PDF document text
    • http://xixizugujixu.iblogger.org/34813655019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365576/normal_5fff0b3295bc6.pdfIn PDF document text
    • http://jibitivi.66ghz.com/bookmark_template_psd.pdfIn PDF document text
    • http://ninijefaligogi.mygamesonline.org/long_bones_anatomy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422372/normal_5fde3b2184eeb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mevuxogimubosin.epizy.com/zaxutuxejusa.pdfIn PDF document text
    • https://cdfb6f36-dde2-4af5-b3b7-55ff39976061.filesusr.com/ugd/c6ac46_0035aadd22844487a6346305f15b2812.pdf?index=trueIn PDF document text
    • https://d064ede3-316f-4d13-8ec5-014b2136b3bd.filesusr.com/ugd/154db6_ce118650c05c4f0c865706d7492aa14b.pdf?index=trueIn PDF document text
    • https://2ddedb0e-b7b0-41c9-a8bc-c018bd0e6e4c.filesusr.com/ugd/70094d_ccebede49b69427d91751926231e2ee0.pdf?index=trueIn PDF document text
    • http://bunisanabasa.epizy.com/52807009614.pdfIn PDF document text
    • http://laxizal.epizy.com/career_coaching_books.pdfIn PDF document text
    • http://bofametif.rf.gd/17002972965.pdfIn PDF document text
    • http://vigamoburijom.rf.gd/gejep.pdfIn PDF document text
    • http://koroxep.rf.gd/jobomagov.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001102a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1102A 5172 bytes
SHA-256: 8853b6e0c63daadf992f73852245acf58886354291b52798f1692c2d3c9655fb
font_01_sfnt_off000121b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121B0 11112 bytes
SHA-256: 4352c7472d021e37a652d8139e8c486c70c766ddcd1fd2164c80a200fad6ea49
font_02_sfnt_off000147c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147C4 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15

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