Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e342452c0066bc4…

MALICIOUS

PDF

79.8 KB Created: 2021-04-14 04:00:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 34a876973674e3e54117e01548895408 SHA-1: e48d41a390c2e5f4667616b2b0cf375f6e9eb89f SHA-256: 0e342452c0066bc48eb9127215e80a72126ad8c3309ba4cd48e75a27f30868f3
176 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous external links, including one pointing to a potential link farm, suggests an attempt to redirect users to malicious websites. The 'SE_CALLBACK_LURE' heuristic further supports a phishing or scam pretext, likely aiming to trick users into clicking the embedded link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://gimoguvi.ru/strik?utm_term=computational+fluid+dynamics+course+in+bangalore PDF link annotation
    • https://cdn.sqhk.co/rubovadu/GhfNifo/19493490664.pdfIn PDF document text
    • https://cdn.sqhk.co/baxorurifina/dWqF0hb/best_open_world_rpg_games_for_android_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/molipigi/rZ7hjfy/80703485402.pdfIn PDF document text
    • https://cdn.sqhk.co/mokopizel/gAhaKpz/neon_light_tumblr_wallpaper.pdfIn PDF document text
    • https://cdn.sqhk.co/vefapatape/ji8Ehjc/86873355622.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/suzujewa/xizavivumoxovesole.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/teriponoti.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/weather_report_lahore_in_urdu.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/paxemofejutipufimigo.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/advanced_java_concepts_with_examples.pdfIn PDF document text
    • https://2a0daf8d-7d8f-48a8-9da6-1f2c606fcb3a.filesusr.com/ugd/adb9e1_1adbe82cfbf64f01b180e004e42e69e5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nokiva/3306270077.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/percy_jackson_and_the_olympians_plot_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/articles_of_confederation_reading_comprehension.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/best_google_assistant_app.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/rifatasajuvolil.pdfIn PDF document text
    • https://5a8aee2d-3d68-4c09-98ed-743c9c56d6fd.filesusr.com/ugd/460efe_1df3cf9b83dd4a6fbd32bade3dbe923b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/roxawo/jefifusigukanivofufitosi.pdfIn PDF document text
    • https://fe92b815-f0fe-4223-924b-659339f44b90.filesusr.com/ugd/8f64fc_437d0072ea5c40e692d44ddcd7c76085.pdf?index=trueIn PDF document text
    • https://96a9e3af-f0c3-4048-9e6c-0ad8da3c6018.filesusr.com/ugd/15d534_c68f7a2ddaab4d54aaeb7758272aff54.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sitok/singer_fashion_mate_3333_bobbin_size.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/foxtel_movies_disney_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/nanostation_m2_wifi_range.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_off0000f9cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CF 5620 bytes
SHA-256: d33251c4df834821737a38249ce875c56da9972ca36502d16e4c4ec3d2c78eed
font_01_sfnt_off00010cd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD7 10588 bytes
SHA-256: ebe0cc738201256ed3d470b3bce1916ae9a2d4fb51e1b0db5d26337a6e9fcf13

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