Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a5773b6e1694fb7…

MALICIOUS

PDF

77.3 KB Created: 2021-03-14 02:18:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a95d7689b2aa0d766b69d54bb44bcc8 SHA-1: 7d6dcda8873b6dbce54194013df0d622fb4504cc SHA-256: 0a5773b6e1694fb7649bbf58cf81908cd794517d7b6df2f73ef25770437d8fce
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The document body, though partially corrupted, suggests a lure related to technical support issues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/strik?utm_term=why+isn%2527t+my+sony+subwoofer+working
    • http://babysampler.com/31421509643xp9wa.pdf
    • http://arnautmebel.ru/bim_360_designasryr.pdf
    • http://frontend-developer-azaynullin.site/column_chart_template_google_docsxjnmf.pdf
    • http://sokfresh.fun/lenisofe4zb0y.pdf
    • http://trenolgia.buzz/python_download_image_from_url_urllib37r9fn.pdf
    • http://svarka-aurora.online/mufumupafaxobekap11rmo.pdf
    • http://sandiego-podcasts.com/divarigujufinujapf8mc.pdf
    • http://braco.ru/guess_men_s_cologne_seductivev3ep1.pdf
    • http://trickyturkey.com/exercice_fraction_droite_gradue_cm1t6sk0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bezorito/vifudefaxaxafad.pdf
    • https://s3.amazonaws.com/genedesowul/beautiful_background_images_hd_1080p_free.pdf
    • https://uploads.strikinglycdn.com/files/65f36590-bc23-4d38-ba94-9b868dc90584/necchi_sewing_machine_manuals_free.pdf
    • https://uploads.strikinglycdn.com/files/d5806bee-eba4-424d-af3c-3dd00925b5ad/types_of_jobs_in_electrical_engineering.pdf
    • https://s3.amazonaws.com/kibavutibeved/vshare_apk_for_android.pdf
    • https://s3.amazonaws.com/toguvaju/66596107207.pdf
    • https://s3.amazonaws.com/doxifuba/ditixogekane.pdf
    • https://uploads.strikinglycdn.com/files/5852af4a-5df9-4f42-9097-d9c2e9d19eea/alesis_micron_factory_reset.pdf
    • https://s3.amazonaws.com/kimone/84366438096.pdf
    • https://s3.amazonaws.com/zesixefe/begogezepewetezawoju.pdf
    • https://s3.amazonaws.com/tubukeganuji/avancemos_2_unidad_4_leccion_1_crossword_answer_key.pdf
    • https://s3.amazonaws.com/fizaxo/cbse_date_sheet_2020_class.pdf
    • https://s3.amazonaws.com/vasofirida/tomoe_butterfly_valve.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eeec.bin
3f2e0b8f697671389d891c7f2d94b3f316aa5169ee03c3b9923267d6da7ac2b7
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEC 5384 bytes
font_01_sfnt_off00010141.bin
2d31b9df7a9987cddfa19842698bb8842ef08db875c57e3a28acb594ee3e2650
pdf-font-stream PDF embedded font (sfnt) at offset 0x10141 11172 bytes