Malicious PDF — malware analysis report

Static analysis result for SHA-256 57966be124e0f2f8…

MALICIOUS

PDF

73.1 KB Created: 2021-05-09 22:35:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 13be06ee981794fbb0073130ec30dc50 SHA-1: b8c464188f6c62f0cf2b6db97ef364db18b240cb SHA-256: 57966be124e0f2f8bd289c68650c2a2dbd85aa31befaadddf18202e0680c3001
126 Risk Score

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-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://golowaki.ru/strik?utm_term=wolverine+f2d+mighty+manual PDF link annotation
    • http://bowoporoj.iblogger.org/bezolatuzutipaxa.pdfIn PDF document text
    • http://wizatone.iblogger.org/ontario_drinking_water_quality_guidelines.pdfIn PDF document text
    • http://noxerazomefo.iblogger.org/84184111104.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/bomifabipi/73302309803.pdfIn PDF document text
    • http://wixesazu.epizy.com/3473354742.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/chainsmokers_illenium_ringtone.pdfIn PDF document text
    • http://zixadadafupeg.epizy.com/dragon_age_asunder_epub.pdfIn PDF document text
    • http://lidikulogape.rf.gd/french_revolution_textbook.pdfIn PDF document text
    • https://0298dc5a-7924-4276-8279-06452a5288da.filesusr.com/ugd/b30cf0_6b24b0ff74be48a697befa2e05a7574b.pdf?index=trueIn PDF document text
    • http://buvanudune.rf.gd/early_childhood_education_thesis.pdfIn PDF document text
    • http://kodasakame.rf.gd/nuroxenigosudosi.pdfIn PDF document text
    • https://9f53eded-325d-4e02-8430-7c09bd872488.filesusr.com/ugd/e04405_1414f212f8a845e68668e92c47f5de9d.pdf?index=trueIn PDF document text
    • http://divimoxigorube.epizy.com/understanding_business_10th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/free_printable_t_shirt_order_form_templates.pdfIn PDF document text
    • https://e61e9f85-32c5-4861-9fd4-b89109084c35.filesusr.com/ugd/2e4eb4_10d2c4ce762a43bfb53f2ae55584d21c.pdf?index=trueIn PDF document text
    • http://garimawaje.rf.gd/wahl_trimmer_parts.pdfIn PDF document text
    • https://86cafecd-0af7-43e6-b578-14605c742a6c.filesusr.com/ugd/c4ddd0_7ba770817cc44397bb1dfe7dc0f370a8.pdf?index=trueIn PDF document text
    • https://abe99a74-823b-4c5d-85d6-f8d8de52422f.filesusr.com/ugd/73cc63_07fbf405f9bb4061bf75832776addeef.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/31297159483.pdfIn PDF document text
    • http://livewimujekofo.rf.gd/ejemplo_de_propuesta_de_investigacion.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_off0000dfa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA3 5448 bytes
SHA-256: 190963d830eeac24dd798e958eeb2b427e9e4ea087e876099e9d7be4b746ed0c
font_01_sfnt_off0000f219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF219 10788 bytes
SHA-256: f2ce2cd348f6f462b9e043a88ce9877a0e26492da686513c7ea8c9b5f7f42a6e

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