Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb1877f8908ca49d…

MALICIOUS

PDF

74.6 KB Created: 2021-03-11 01:26:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 779fe515ed81e5c60b1928a6a04309f3 SHA-1: d3a3b74a244d38e386df453a4b4befcd70f694bb SHA-256: bb1877f8908ca49dbf1c5d0547489e78a0ee859f1c4eb9e909c1a505fb4865f8
164 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. The presence of numerous external links, some pointing to suspicious domains like jumiwimov.ru and kvrovk.xyz, suggests an attempt to redirect users to malicious content or phishing sites. ClamAV also detected this file as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/123?utm_term=disney+character+faux+leather+sheets
    • http://kvrovk.xyz/how_did_the_cold_war_affect_the_environmentmm7gs.pdf
    • https://foguvebosep.weebly.com/uploads/1/3/5/3/135315209/1217075.pdf
    • https://cdn.sqhk.co/ridijafugemi/54Lhdhf/96402961485.pdf
    • https://cdn.sqhk.co/vekuperik/cUytia9/76036874728.pdf
    • https://kowagazobavov.weebly.com/uploads/1/3/0/8/130874359/bad9b0e0e7e1b36.pdf
    • https://basitonivi.weebly.com/uploads/1/3/4/5/134584834/ziduwuk.pdf
    • https://cdn.sqhk.co/vedasukuki/jfXTzho/29384913143.pdf
    • https://cdn.sqhk.co/mifigatira/cwZQbkm/word_connect_answers.pdf
    • http://pokupka.space/bandura_self_efficacy_theoryd13cm.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://20996a60-9695-4f45-8fdb-44bdc783da55.filesusr.com/ugd/c57cae_eb0f79f996064b2a83c9a16cc07fbe9b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/77633485-2db1-4628-b99b-7ae5e2257343/how_to_do_the_thanos_snap_effect_on_google.pdf
    • https://uploads.strikinglycdn.com/files/1ed27e94-4f7f-487d-936f-07f92b0bbd21/94822999236.pdf
    • https://f8d4b294-f952-4a11-85e8-0a3036f9bdaf.filesusr.com/ugd/ad8f3a_eb12f01152cf4282b049e90a781c2f16.pdf?index=true
    • https://uploads.strikinglycdn.com/files/e39774e3-b5f3-468d-b9f6-36e9b07df241/a_short_history_of_the_movies_11th_edition.pdf
    • https://uploads.strikinglycdn.com/files/4863ad3e-915e-45e9-b2bf-64dbdf2e177f/fijilojuvabuvagap.pdf
    • https://uploads.strikinglycdn.com/files/e95a1f3a-2c60-4aae-bd9c-2810f8bb5c65/wolf_gourmet_countertop_oven_manual.pdf
    • https://uploads.strikinglycdn.com/files/beb5b6bd-5938-4cfb-a275-5ea161334ace/bluetooth_keyboard_and_mouse_for_ipad_pro_12.9.pdf
    • https://uploads.strikinglycdn.com/files/29ef75d9-c40e-47ab-861c-53aae7e85c18/69140481280.pdf
    • https://uploads.strikinglycdn.com/files/685064a1-49f5-4407-a650-d7a71d098aa5/simple_compound_and_complex_sentences_worksheet_for_grade_5.pdf
    • https://af1bea64-f5cd-41c2-a7c1-97f21c1aa057.filesusr.com/ugd/592671_4efa7de2944d474c8369094fb4490799.pdf?index=true
    • https://uploads.strikinglycdn.com/files/30d56d37-85d7-411f-ad22-bbb1f4e55998/how_to_reset_trane_thermostat_after_power_outage.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cff2.bin
04444999e6cc5e6ca53d611263e8f9184766facaede8bbdae858e15b27aad4bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF2 5136 bytes
font_01_sfnt_off0000e17d.bin
5b9c521b5beedb66bdf1e2e100d786e6c8a13d24d4bef41303dd49c366ee4461		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE17D 10824 bytes
font_02_sfnt_off000106de.bin
ed45a24507f18daeaf6b6e9cac20235e9e43bed88bc2d44b7621eff085e31190		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106DE 16344 bytes

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