Malicious PDF — malware analysis report

Static analysis result for SHA-256 7066e5e091ee5a79…

MALICIOUS

PDF

81.4 KB Created: 2021-05-30 04:49:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 5de69e51b98d4e274a527f3feced7c9b SHA-1: ba4c66cd91bebce9e2f79a62635c2ceabc27f660 SHA-256: 7066e5e091ee5a798e6f3b4827d1e78062f813963841c7091262dec09f3e7504
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are to domains associated with link farms or phishing attempts, as indicated by the 'PDF_SEO_LINK_FARM' and 'CLAMAV_DETECTION' heuristics. The 'ML_NYX_PDF_MALICIOUS' score of 0.998951 further supports its malicious nature. The presence of embedded URLs and the overall structure suggest an attempt to redirect users to malicious sites, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://nipisod.ru/123?utm_term=assistant+loco+pilot+exam+paper PDF link annotation
    • https://soputepitup.weebly.com/uploads/1/3/5/9/135973261/lejavugajuduzimuvoto.pdfIn PDF document text
    • https://fewegako.weebly.com/uploads/1/3/1/4/131453302/1043024.pdfIn PDF document text
    • https://rejifiri.weebly.com/uploads/1/3/1/3/131380436/3133561.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461204/normal_5ff8c337e8a19.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369486/normal_5ff34efea329d.pdfIn PDF document text
    • https://fiwazapabuw.weebly.com/uploads/1/3/4/3/134357015/cc28499006aef68.pdfIn PDF document text
    • https://nuniladolu.weebly.com/uploads/1/3/0/7/130775245/1952167.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2cfc70c-6f4b-4295-9091-bb869ed9ebff/how_to_add_roms_to_nds4ios_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f09064d-89de-4208-9bd7-b4f1b1b06f2e/strongman_strength_training_routine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a8d0a3a-a3c5-49f8-b426-4b70cb7e81ff/pujopamobutej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2fe22bf-74a6-4c85-97f2-9907d4cfad97/designing_great_beers_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dc0b908-9a7a-4c17-a700-ef02fef46561/20977554360.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e30cef88-e39b-4115-a1e3-c947dd59592e/sony_rx100_viii.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/483aca7a-57cc-4a69-abf6-651cadeee176/lufezubolapogeremale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f49bd39-0e36-4dfc-8f68-7e353259459c/jidugavabufibatuzexan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b85c18b2-2ddf-4ec0-8f3b-8d2165389afa/existence_abbi_glines_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6e2e486-089c-42a6-9eb8-f880f5e80ff9/1305650439.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a04156a3-9e97-4cf3-8690-66cda2c7f8ed/best_thing_to_get_at_arbys_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/489c60ac-33c9-496d-a1e9-af3e54751d0d/47382932569.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f64d97c-f0ed-435c-b33c-1ace7cc07872/82196215397.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a262c297-4e27-4c60-adc9-6e020079b43f/what_is_the_best_3_quart_air_fryer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0da053bc-41e7-442c-9287-a812d811c5ad/papigexubawisikirewufof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c83ffdb-a637-4320-ae91-269b795ee3e5/zigavakenadikakexoxafo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d01299f-5358-40a0-821a-4c940095eefc/95184218660.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1caaa92-9ee5-400f-9562-5f0d31208c80/92162188341.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF360 5136 bytes
SHA-256: 0b18bbafa83d3e2aa8196c99f5e21daf1e251c364649d43d37f8cc17df1658b4
font_01_sfnt_off000104c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C5 11672 bytes
SHA-256: 3ee8e679c9fa8652da7c2d0dc06e952e0493fcbec77bc675d6631d68d16f33bc
font_02_sfnt_off00012c85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C85 2752 bytes
SHA-256: 11bf571f0af05367446b2020c2f1c6267491649bc48117454eca19867f219dc9

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