Malicious PDF — malware analysis report

Static analysis result for SHA-256 53b930bc114d0de7…

MALICIOUS

PDF

76.6 KB Created: 2021-04-20 01:32:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 3feb2aa56c9ffd610a6b50edf390d1ae SHA-1: 2c2399a5bd19fa476e3c3fbb810f9f206784ffd6 SHA-256: 53b930bc114d0de718db55992a89267fc1c0991c3fc607c2729d11444962a441
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model indicated a high probability of maliciousness. It contains a large number of external links, with the heuristic PDF_SEO_LINK_FARM specifically identifying a mass link farm. One of the primary external URIs points to 'soxebez.ru', suggesting a phishing or malicious content delivery attempt. No scripts were extracted, but the PDF structure and link farm indicate a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://soxebez.ru/strik?utm_term=how+to+use+bella+juice+extractor PDF link annotation
    • https://cdn.sqhk.co/tarozawowe/iahdgik/police_cars_ambulances_and_fire_engines.pdfIn PDF document text
    • https://cdn.sqhk.co/fetesulatol/6iahhgk/tetonuluvanidotelivofo.pdfIn PDF document text
    • https://cdn.sqhk.co/xidizizo/pBgeNje/android_9_call_recording.pdfIn PDF document text
    • https://cdn.sqhk.co/nizaveni/jibaKia/16452568567.pdfIn PDF document text
    • https://cdn.sqhk.co/dozawulu/deLtgim/caracteristicas_de_la_constitucion_de_guatemala_de_1965.pdfIn PDF document text
    • https://cdn.sqhk.co/sebutarukaw/hoXBgdJ/disney_tsum_tsum_game_line_login.pdfIn PDF document text
    • https://cdn.sqhk.co/vagekoxes/qyajdge/boomerang_maker_from_camera_roll.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvidomanale/ihbEmbL/screen_time_passcode_recovery_ios_13_free.pdfIn PDF document text
    • https://cdn.sqhk.co/ninulekuto/cgthgig/snow_trails_ohio_vertical_drop.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/bipovoromoj/18959185043.pdfIn PDF document text
    • https://64e18f06-8a0e-4dc1-8427-9dd81b4bff36.filesusr.com/ugd/baa514_7b4a34a783194a5ca79f2e67411f48df.pdf?index=trueIn PDF document text
    • https://33b7cf8b-1cb2-46d9-9063-17e97cba5e80.filesusr.com/ugd/9edd50_5daedeedf7b943299726a7ae760d5c82.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/benuka/70525127106.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/apush_study_guide_chapter_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ab1c432-a497-438e-8a62-d3b70900952f/samsung_un65ju6500fxza_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/autocad_kitchen_plan_blocks_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45b42a9d-d422-4f67-ad03-c899e7d8bb4a/the_maze_runner_book_series_wiki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b288860c-3002-4038-a174-bd7ccb33850b/wendys_dubai_menu_with_prices.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25c3180e-716c-4b1d-bca3-221d4725e8e2/3835362527.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_off0000ef86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF86 5128 bytes
SHA-256: bffa68339c5ba2cdcf7948cb88d48a0fb070e13daa9fe0e94e3e06255b5c5a98
font_01_sfnt_off0001011d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011D 10736 bytes
SHA-256: 3bcd2cec8e359b74951ae0ddb1333ee1ab1980c44f4a0baeb767abfa950dbd2b

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