Malicious PDF — malware analysis report

Static analysis result for SHA-256 706216dd5eff3736…

MALICIOUS

PDF

228.5 KB Created: 2021-03-21 02:24:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 06b94b7d95812bc42ca1d79bcd84ef93 SHA-1: cb3ec7e6e5afe7eeb0ddf1a49e9d86dfb98b3ff9 SHA-256: 706216dd5eff3736e3e3eff92def065e7fb061635c38fd5a6fc2d5dd84aa68a9
136 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. A heuristic identified an image lure linking to an SEO redirector at https://dugedepap.ru/123?utm_term=incident+report+sample+nursing+homes, suggesting a phishing attempt to download a second-stage payload. The document body appears to be obfuscated or corrupted, preventing a more detailed analysis of its content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://dugedepap.ru/123?utm_term=incident+report+sample+nursing+homes PDF link annotation
    • http://otshelnik.net/batejox3bo18.pdfIn PDF document text
    • http://zakemelevij.iblogger.org/lasagna_with_butternut_squash_lasagne_sheets.pdfIn PDF document text
    • http://rezisugamufi.22web.org/jurijimibonufubezerudopi.pdfIn PDF document text
    • https://basitonivi.weebly.com/uploads/1/3/4/5/134584834/zijedopularabuzu.pdfIn PDF document text
    • https://ronurakegilapoz.weebly.com/uploads/1/3/4/8/134852428/mujajavojolemiw-rufapobes-rimazate-kabegelo.pdfIn PDF document text
    • https://fasexonepagi.weebly.com/uploads/1/3/0/9/130969542/3756422.pdfIn PDF document text
    • https://vipogonegope.weebly.com/uploads/1/3/0/9/130969266/nagazosugep.pdfIn PDF document text
    • http://fringigejy.site/14099490131itu78.pdfIn PDF document text
    • http://boldly-grow.com/k5_learning_reading_comprehension_worksheets_first_grade5zh5k.pdfIn PDF document text
    • http://indonesia2health.online/2019_harley-davidson_touring_models_service_manualb2sh9.pdfIn PDF document text
    • http://pubgucbayim.com/fivumirewanadereg7dh7s.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/fe6ac65e-1319-4e12-9149-7c81a6c0f6f1/how_to_use_farberware_nutrimaster_pressure_cooker.pdfIn PDF document text
    • https://f733e552-90a1-4d1f-83ca-a6b36afcf31c.filesusr.com/ugd/38bf1f_c1fec0d2cb5b406fa773ea7f95a517f2.pdf?index=trueIn PDF document text
    • https://d427386d-3434-45d9-8802-370857a594f4.filesusr.com/ugd/accd1f_f97e198a26aa4cb5a9060737d5a5c418.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe34334f-f1e0-4d20-af07-8950b5b77c35/mujonusofo.pdfIn PDF document text
    • http://kanobar.epizy.com/computer_workstation_ergonomics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2536c905-a62e-41eb-b533-0fc8c74ed9e5/levapoxi.pdfIn PDF document text
    • http://roragopijejem.epizy.com/cyberpunk_2077_ps4_pro_gameplay_4k.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f224b153-7557-4aab-8e47-c8696772fee8/how_to_heal_pimples_overnight_naturally.pdfIn PDF document text
    • http://goxafufi.rf.gd/bofajexosaneriwojuw.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_off00033a30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33A30 5304 bytes
SHA-256: 754c13727f2f52e42cce4d441869a6a9dbd21f0ad7b352defe0a57f26bb9f13c
font_01_sfnt_off00034bf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34BF4 12240 bytes
SHA-256: c2b37c16152e42c7e60b2f09a04c4ccd4178922df67f2e4492cd8c9b015d44ba
font_02_sfnt_off00037499.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x37499 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176