Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d7984fa00c1903f…

MALICIOUS

PDF

73.5 KB Created: 2021-06-10 23:01:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: ca7cf73b4a9c08191149a913ffa6f465 SHA-1: 0a7f3a38fecb4f5de2fe07f1fa69f9447f4af015 SHA-256: 1d7984fa00c1903f594ccd3d9ebcc206cca378ca1abdd0f219b7ac014a79b737
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The embedded URL 'https://allytemp.ru/pbw?utm_term=what+i+know+for+sure+oprah+pdf+free+download' suggests a lure for users seeking a specific document, likely leading to a malicious site. The PDF also contains numerous links, many pointing to disposable hosting, further supporting a link farm or phishing scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://allytemp.ru/pbw?utm_term=what+i+know+for+sure+oprah+pdf+free+download PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4418557/normal_60b0bb3c41840.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459180/normal_600afee9ad9e4.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4455179/normal_60affdb31b6f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407810/normal_5fe74c474fe58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416659/normal_606d4e516366b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369772/normal_5ff71813ca3af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497395/normal_60247eb517e8c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vakerul.pbworks.com/w/file/fetch/144512106/who_does_the_employment_equity_act_apply_to.pdfIn PDF document text
    • http://kunixove.pbworks.com/f/kotirujomexikufebez.pdfIn PDF document text
    • http://kukepofarit.pbworks.com/w/file/fetch/144651045/92796039225.pdfIn PDF document text
    • http://vimiluze.pbworks.com/f/lamazumotexajuri.pdfIn PDF document text
    • http://fosirodovo.pbworks.com/f/balance_chemical_equations_worksheet_1.pdfIn PDF document text
    • http://lekipirunezi.pbworks.com/f/42980035745.pdfIn PDF document text
    • http://kinuwibe.pbworks.com/f/bugiku.pdfIn PDF document text
    • http://jamexapageku.pbworks.com/f/kulubud_daria_oku.pdfIn PDF document text
    • http://jojekepodef.pbworks.com/f/vewezejuv.pdfIn PDF document text
    • http://tukufidanega.pbworks.com/w/file/fetch/144425787/21062573550.pdfIn PDF document text
    • http://febigadeviti.pbworks.com/w/file/fetch/145065033/sakedubefelaguzegidanowup.pdfIn PDF document text
    • http://veniwusuj.pbworks.com/w/file/fetch/144980220/pezilarij.pdfIn PDF document text
    • http://xixapeg.pbworks.com/w/file/fetch/145038834/18816580781.pdfIn PDF document text
    • http://xovelezid.pbworks.com/f/pokemon_battle_revolution_dolphin_save_file.pdfIn PDF document text
    • http://xuzutoli.pbworks.com/w/file/fetch/144655380/77543747818.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_off0000e313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE313 5300 bytes
SHA-256: 5baa8441ea0422566dc91d37e82cd59dba0d043a92aae63231397bb39d3f349d
font_01_sfnt_off0000f530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF530 10544 bytes
SHA-256: 0d060b690a75d1f4fee5703ebe65659cea7e3ae6c91b106657e5848bdd45f269

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