Malicious PDF — malware analysis report

Static analysis result for SHA-256 60724ee4588c8b9c…

MALICIOUS

PDF

103.2 KB Created: 2021-03-21 03:55:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 2c3c2b44f1475292e41f046dfbbb275e SHA-1: 13f441158769d07b6df179916ae80b5516b398c7 SHA-256: 60724ee4588c8b9ca64271ec0b1be12240e19c1afedbe7ad919b46e480554141
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL pointing to a site that appears to be a lure for phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for multiple links, suggesting malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence score strongly suggest malicious activity, likely involving redirection to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://soxebez.ru/wix?keyword=the+crucible+act+2+quiz+answer+key PDF link annotation
    • http://kixurox.getenjoyment.net/cells_and_its_functions.pdfIn PDF document text
    • http://remontnatali.ru/gst_act_with_latest_amendmentstg6yv.pdfIn PDF document text
    • http://cmb-eco.com/23693302469shkfy.pdfIn PDF document text
    • http://zagavexakagin.mypressonline.com/33407008395.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
    • http://tujupifirafadus.myartsonline.com/how_to_insert_file_in_excel_as_icon.pdfIn PDF document text
    • http://viziwufeki.rf.gd/tarazabakirojasa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03a34195-7e77-47e1-a059-df6c36bb6cb1/rlc_circuit_lab_report_abstract.pdfIn PDF document text
    • http://ridurosumebo.epizy.com/2012_jeep_grand_cherokee_overland_transmission_problems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cb788bd-5029-439d-bba5-f10a0597a9b8/how_to_pull_the_heros_sword.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9db54b5d-e0a2-4202-8dcf-40b2feb17359/samsung_hw-f550_en_2.1_soundbar_mit_subwoofer.pdfIn PDF document text
    • http://xezaretidatoro.onlinewebshop.net/razoranenolup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dfb6682-39ce-4b95-b2d3-1e7796bf8101/76459279021.pdfIn PDF document text
    • http://rojanesifilagu.myartsonline.com/487821181.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb0d008e-d525-4408-bfff-c81b2be75eb7/93262446578.pdfIn PDF document text
    • http://pizupefowe.rf.gd/afl_fixture_list.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off000155b7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x155B7 17932 bytes
SHA-256: 72fb6e87487dd8edc5f3c028297624c5574c4469c98b53566f667c853243b9e8
font_00_sfnt_off0000f2de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DE 6600 bytes
SHA-256: 8f97787a98c1393565a74ecc7841718c6ce1318e2efe62e3dff35bae59e0a228
font_01_sfnt_off00010335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10335 3580 bytes
SHA-256: b8dcbccb8527b0453edbf66304fe114cb9183338fc990eafba4e63cd45179744
font_02_sfnt_off00010fe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE7 5312 bytes
SHA-256: 8865f32dd412afb35ee38c3b97d91461e5de111d50b1d0fc4610862e3d7c2977
font_03_sfnt_off00012212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12212 15988 bytes
SHA-256: 4890ab2e82087f30b6128bc77b0a3b643a131c94523209c9ae121aa074034419
font_05_sfnt_off000170dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x170DC 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
font_06_sfnt_off00017e9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E9E 6168 bytes
SHA-256: ecaed841d44862ffd53edac83c1daec4909e563930e0f58eb6d977f34e82a8d1