Malicious PDF — malware analysis report

Static analysis result for SHA-256 db4ae05ec653a05d…

MALICIOUS

PDF

80.2 KB Created: 2021-03-23 01:10:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: f4b3f49da1f66ead13d9b9610585aef8 SHA-1: b9d42b49e9120f1d3d3916b6dba0f509050df66e SHA-256: db4ae05ec653a05d497da611c237751170a1ca316f6bd34db0abfce73eeaf3f2
126 Risk Score

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, with one prominent URL pointing to 'golowaki.ru', suggesting a redirection to a malicious site. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is part of a link farm on disposable hosting, further supporting a malicious intent to distribute links.

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://golowaki.ru/wix?keyword=a+love+to+last+may+15+2020 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476133/normal_5fe632d012831.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383321/normal_601a6520c2f13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415546/normal_602158892ecbc.pdfIn PDF document text
    • http://sigisuzuk.getenjoyment.net/v_for_vendetta_free_movie_download_mp4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499285/normal_5ff172312de8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501993/normal_60591eba828b2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://laxolivavaru.epizy.com/bipolar_disorder_a_family_focused_treatment_approach.pdfIn PDF document text
    • http://pidodexogejax.myartsonline.com/35676857564.pdfIn PDF document text
    • http://nibejodawugizex.rf.gd/savajurapesijojur.pdfIn PDF document text
    • http://puxujedupis.epizy.com/gijezoropije.pdfIn PDF document text
    • http://dutugege.epizy.com/free_worksheets_addition_and_subtraction_first_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cae9f9e1-a015-469f-bd55-59a5c5297360/40412279019.pdfIn PDF document text
    • http://gebefamudusefo.epizy.com/kingdom_animalia_phylums_and_classes.pdfIn PDF document text
    • http://fazaburifug.myartsonline.com/ordained_minister_wedding_ceremony_script.pdfIn PDF document text
    • http://nasobozavas.epizy.com/pusutedariter.pdfIn PDF document text
    • http://bizosubage.rf.gd/jamemalowesopukem.pdfIn PDF document text
    • http://sogivuwe.onlinewebshop.net/86248234876.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29220751-428c-4448-b1ab-94c56771212c/nawagimodorepogox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/794ea74a-98ea-4cd7-94d5-76a5b06193e4/legend_by_marie_lu_series_in_order.pdfIn PDF document text
    • http://jetetejev.rf.gd/608465526.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f43ee2f1-a4e2-4107-8817-33fe502834be/fun_race_3d_mod_apk_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/378909d1-7719-4f37-b835-55aa84a00029/harlan_ellison_books_amazon.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_off0000faa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA2 5336 bytes
SHA-256: cba6dc8f18a6fc5b98063931fb2ded51bfb812648e00199c435b59954c0913c6
font_01_sfnt_off00010cd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD4 10968 bytes
SHA-256: db4d2be9d218fd7bd4585b14392fc13639dae1f7e28bd9c721cd9fa5b7145c2e

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