Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5976ccc3a19498f…

MALICIOUS

PDF

82.4 KB Created: 2021-04-02 14:48:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a8df0a6627f489c548bcd83a375f5299 SHA-1: 8813757f37461259146ddf5d04941862763b0fc6 SHA-256: a5976ccc3a19498f6a1fd5ec017449d4d8d399026c8cfa7eab32e00ceab888ec
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://gimoguvi.ru/wix?keyword=kaspersky+internet+security+activation+code+2017 PDF link annotation
    • http://zenezadeso.22web.org/ubuntu_for_beginners.pdfIn PDF document text
    • http://1fps.ru/how_to_setup_honeywell_t5_thermostat2r540.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474231/normal_602af215dbd4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383340/normal_603562663cfcc.pdfIn PDF document text
    • https://cdn.sqhk.co/mitobogeraku/djiBcja/bawos.pdfIn PDF document text
    • https://cdn.sqhk.co/nebafori/jj3Wuhe/forester_xt_off_road_build.pdfIn PDF document text
    • http://rutevelafi.iblogger.org/environmental_management_plan_template_nsw.pdfIn PDF document text
    • https://cdn.sqhk.co/wosipuvetot/hegcmHJ/44738202793.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380523/normal_605565588d566.pdfIn PDF document text
    • http://vinnipoh.space/definicin_de_salud_pblica_segn_winslow1rh9c.pdfIn PDF document text
    • https://cdn.sqhk.co/kokojisip/gjY0jfV/afc_space_shooter_apk.pdfIn PDF document text
    • http://rajebamif.22web.org/xumuzub.pdfIn PDF document text
    • http://italywom.space/vuwiglo6gs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://587b455d-cc79-4428-8e80-a8b75ce23bca.filesusr.com/ugd/021ec8_abac0a02b07441eb962fab028c842857.pdf?index=trueIn PDF document text
    • http://sakikuzugodo.rf.gd/canon_mf4450_scan_program.pdfIn PDF document text
    • https://234a0c07-d908-4261-bb83-16b3c96a9b04.filesusr.com/ugd/73e0e6_132afb754a30413780a9e8e66b24dc32.pdf?index=trueIn PDF document text
    • http://xojozefobulujox.epizy.com/88298755101.pdfIn PDF document text
    • http://kedekivotizera.epizy.com/lobavoxe.pdfIn PDF document text
    • http://jefevuxivux.epizy.com/app_free_google_play_store.pdfIn PDF document text
    • https://e46eb8ae-11b5-47af-91b5-79e2db369635.filesusr.com/ugd/f84671_05e5696bfce04fe5bfb19c21b7be2abd.pdf?index=trueIn 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_off0000ebe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE2 5636 bytes
SHA-256: 0e84ae795f0e919e2851a0750e60fe9a2bbbcc47b9d561a7cf5f5b0c86d2980f
font_01_sfnt_off0000ff42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF42 11048 bytes
SHA-256: dc4ef256dd33721dd90857404611bd71f753bbef7ff4b6db3e6b194650a31bb4
font_02_sfnt_off00012542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12542 16068 bytes
SHA-256: 9e1271d681207e96fe60c94df920a27091a957dc81e2614e9e6235263a34fce6

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