Malicious PDF — malware analysis report

Static analysis result for SHA-256 383a343e575062b1…

MALICIOUS

PDF

71.5 KB Created: 2021-04-15 03:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 4f3c018c7d369f0a21fdcb42895b177c SHA-1: d424329fcfc1141ae048be44e9890bfb3808a44b SHA-256: 383a343e575062b1c57096c4fd01bbeeb6a493ecea541f42a1486883380c3437
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, with the primary URL being a potential phishing lure. ClamAV and ML classifiers also flagged this file as malicious, specifically as a phishing trojan. While no scripts were extracted, the presence of numerous external links suggests an attempt to redirect the user to malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • 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://druttle.ru/strik?utm_term=fluke+1507+manual+espa%25C3%25B1ol PDF link annotation
    • https://cdn.sqhk.co/putuziboki/janiaRV/shark_ion_robot_vacuum_av751_mapping.pdfIn PDF document text
    • https://cdn.sqhk.co/mokavokaven/GiiiaDr/71475285142.pdfIn PDF document text
    • http://rozogididibusar.sportsontheweb.net/27447454970.pdfIn PDF document text
    • https://cdn.sqhk.co/jerowerar/dSle5ge/oasis_mindshift_login.pdfIn PDF document text
    • https://cdn.sqhk.co/gofelaxes/jccjaDQ/7204846496.pdfIn PDF document text
    • http://figejewumoposes.getenjoyment.net/44810226005.pdfIn PDF document text
    • http://mobufuwiwid.medianewsonline.com/48159091961.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/gezetega/craftsman_22_inch_electric_start_snowblower_manual.pdfIn PDF document text
    • http://kawerulim.onlinewebshop.net/absolute_advantage_vs_comparative_advantage.pdfIn PDF document text
    • https://ba739632-11db-41f7-a023-683a20e55d36.filesusr.com/ugd/99835b_8201148b2d5445f9bab87ab098d413ef.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xakusineba/capgemini_tech_challenge_2019_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/borat_movie_in_480p.pdfIn PDF document text
    • https://97783159-ced7-426e-9fbd-60d2bb3342fb.filesusr.com/ugd/00058f_1dda8462e7064c9b9d5f4a12a3875053.pdf?index=trueIn PDF document text
    • https://1cdd1dcb-54a5-4750-95ad-c4cce9a68cd1.filesusr.com/ugd/1e32c2_d6d90487611b4ab7b15ff4a867e1f04a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/40520680708.pdfIn PDF document text
    • https://01dc7cc6-b8ed-446e-8cc8-1ad78882ed38.filesusr.com/ugd/e23fbb_b7e59d07d33a46ce9e2c77101d560e30.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/how_much_does_foster_parenting_pay_in_nc.pdfIn PDF document text
    • https://e0f910ba-f4aa-4d6b-87f6-24d78cda99ab.filesusr.com/ugd/cc15ef_e2dcf4c49f3a4125bc7b462f77ed9701.pdf?index=trueIn PDF document text
    • https://ec679cc6-872a-45a8-b2fd-b1bc8f6ddb77.filesusr.com/ugd/d1d005_3dbcbd0f81404c1784050c385bb9fc65.pdf?index=trueIn PDF document text
    • https://8c17aa34-c454-4d6c-a218-8929c845e329.filesusr.com/ugd/808cd0_6e09699baeda40369fe65dd2754d971e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xotomisen/paint.net_smudge_plugin.pdfIn PDF document text
    • https://5f98d79b-b704-4ecc-a618-200e52db7f79.filesusr.com/ugd/d1a5b7_666e5dad511a4aaa9a87ec6389bd0331.pdf?index=trueIn PDF document text
    • https://dc5ca969-d333-4582-9879-b719aca70d73.filesusr.com/ugd/760c43_98de01bd29dd4a74823e5514a1829a70.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/86038590132.pdfIn PDF document text
    • https://8a5a474a-a671-4857-921d-d1df0ee72544.filesusr.com/ugd/523716_ad66e85468bb4f8bbc541e335cb10025.pdf?index=trueIn 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_off0000d648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD648 5496 bytes
SHA-256: 84fe26b1e7f5b7c8c36f8e0b0ee8c63524c1659fca6583263f35db8a2397f32c
font_01_sfnt_off0000e8bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BC 11592 bytes
SHA-256: 4cf31c37add2ca86ea76550c87632a8076522cee80e3f8d364381679c84a5981