Malicious PDF — malware analysis report

Static analysis result for SHA-256 595ed12ced280210…

MALICIOUS

PDF

82.5 KB Created: 2021-05-14 08:59:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 8ae11773d740e7b9fe3d187632ffb7f2 SHA-1: 210f8588a2fbe03ce02419163a41878d9faef196 SHA-256: 595ed12ced280210eee12c6a35773e29b40bd61269027ec47e7845a4231a5a45
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with many pointing to disposable domains and exhibiting link farm characteristics, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a common phishing lure, likely leveraging T1566.001 (Spearphishing Attachment) for delivery.

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/strik?utm_term=serta+motion+essentials+2+adjustable+foundation PDF link annotation
    • http://tehnoprom.org/bradley_bourbonnais_high_school_report_card0ld98.pdfIn PDF document text
    • http://epipog.com/23540349247jwd1m.pdfIn PDF document text
    • http://xomunuxeju.sportsontheweb.net/garekumokipalixawuzi.pdfIn PDF document text
    • http://kozidozilujivox.getenjoyment.net/mulopoj.pdfIn PDF document text
    • http://natgood.space/82955550043tlbim.pdfIn PDF document text
    • http://devgm.design/fokideguby7g1.pdfIn PDF document text
    • http://lukisasore.mywebcommunity.org/denogivexoz.pdfIn PDF document text
    • http://tenipimutav.mywebcommunity.org/behavior_chart_for_elementary_students.pdfIn PDF document text
    • http://coolmag.biz/banakojowijert7mtl.pdfIn PDF document text
    • http://sipipewawezizuf.getenjoyment.net/boolean_algebra_in_computer_architecture.pdfIn PDF document text
    • http://reduslim-shop.site/delta_bentley_s_series_4-in-1_crib_black_cherry9biu6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zorijefugixor.atwebpages.com/pikab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46b9127d-6e2a-4b8f-b905-627b690649f3/36291459305.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48288678-e27f-4dc0-b37b-3b9217c399d6/bubasitowuxifugeli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd074e4e-7365-48aa-abd1-18bd1c653682/does_td_ameritrade_have_a_desktop_app.pdfIn PDF document text
    • http://lojibovel.myartsonline.com/english_speaking_class_for_adults_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eca1bd86-4243-4462-8966-0e1700858c0b/how_much_does_a_vendors_license_cost_in_illinois.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7aa375a-ab35-4154-a065-e9d92074273e/serpents_shadow_chapter_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45b2658b-4423-4798-9423-4451549f4bf6/nososuzoxirumoxumupip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa0b60b0-1b72-4872-acc1-1fa061557eca/44825813579.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_off0000ee1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1F 5504 bytes
SHA-256: f70b1031a46daa41121dc514d95e6a39544f4cc1d0beb4751793cc8008947c57
font_01_sfnt_off000100be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100BE 11176 bytes
SHA-256: a3aca80b928bd50b11db438760546572cf2200f38a24561d1d63591a285113e6
font_02_sfnt_off0001270c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1270C 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15

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