Malicious PDF — malware analysis report

Static analysis result for SHA-256 1654fc0a736e10e1…

MALICIOUS

PDF

81.4 KB Created: 2021-03-18 20:02:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: c1afe4f55e36969260653e5540f3951d SHA-1: 690a53157f813c8f38e9ffd06ff022ee526bdae6 SHA-256: 1654fc0a736e10e1df3d961c9522cb2d08299ae6cc14c048239423a15d37fce1
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains an embedded URI pointing to 'resalured.ru', which is a strong indicator of a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/strik?utm_term=dell+t3500+ram PDF link annotation
    • https://gosupafitowiru.weebly.com/uploads/1/3/4/6/134673249/b0794.pdfIn PDF document text
    • https://cdn.sqhk.co/midijanere/dTtG9YQ/micro_mechanic_app_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/moromasi/uliijbj/kitolevutujo.pdfIn PDF document text
    • https://lumewogomor.weebly.com/uploads/1/3/4/3/134319436/mibimen.pdfIn PDF document text
    • http://fishland.store/ikea_malm_bed_frame_fullnsuwo.pdfIn PDF document text
    • https://cdn.sqhk.co/jumosanex/zZTgdjd/power_pop_bubbles_game_download_uptodown.pdfIn PDF document text
    • https://cdn.sqhk.co/fazejitev/hdpW4ig/zubuxavipukaxamalolope.pdfIn PDF document text
    • http://prosale.company/184594569227vlcc.pdfIn PDF document text
    • http://verification-help.business/4638428874123oo.pdfIn PDF document text
    • http://gratoraama.space/47346126756knpnq.pdfIn PDF document text
    • http://confirmyourverifiedbadge.com/craftsman_200_mph_leaf_blower_partsy5icb.pdfIn PDF document text
    • https://fikijumosoliz.weebly.com/uploads/1/3/5/4/135400707/6736303.pdfIn PDF document text
    • https://paguzijap.weebly.com/uploads/1/3/1/4/131453408/demisasigezulezewidu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/towakog/i_pace_top_speed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a7300a9-6d15-443a-8832-b41c90d2890d/sofaxegejuwaginabezegor.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/burazowozewividujuroziv.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/not_fade_away_guitar_tabs_rolling_stones.pdfIn PDF document text
    • https://50b44c92-959e-4a15-bf83-93d6b2b518d6.filesusr.com/ugd/3ed44c_9d35d707f5da495a86b2e2fbdb45a268.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6629bb2d-49b5-436e-aa06-3447abb74e2d/philips_norelco_multigroom_5000_vs_7000.pdfIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/historical_thinking_skills_worksheet.pdfIn PDF document text
    • https://7f06b679-e14d-4525-8955-d56a7cf6f710.filesusr.com/ugd/79e5df_d4d3849b2fbb44689f7d8f97f61b8c97.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD92 5080 bytes
SHA-256: 4c4e7248303b96694c05e7ba4409c7bf95d85183e0c20d8f0a3737b78d2980b3
font_01_sfnt_off00010ecc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ECC 12216 bytes
SHA-256: 30e2785cd6ae4284e25e3104e56d3365da35b6784861b2e9530a62790c2ea754

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