Malicious PDF — malware analysis report

Static analysis result for SHA-256 bafa2c515b2f6590…

MALICIOUS

PDF

79.8 KB Created: 2021-04-02 19:10:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: dbff34eb4495637ffc9f97e0f21b8a8c SHA-1: 9fb8998acf1425224b7efc83c8310c7d7a24f052 SHA-256: bafa2c515b2f65906d0b9a8f5d4d436edf28e9d27519326c64d4e4f69905097e
156 Risk Score

Malware Insights

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

The file is a PDF containing a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. Several of these links point to unknown or potentially malicious domains, suggesting an attempt to manipulate search engine results or redirect users to harmful content. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

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://nipisod.ru/award?keyword=epistaxis+pdf+tratamiento PDF link annotation
    • https://tivofexogi.weebly.com/uploads/1/3/1/3/131398075/5678866.pdfIn PDF document text
    • https://fubalaxusagipun.weebly.com/uploads/1/3/4/1/134108832/195659d13.pdfIn PDF document text
    • https://cdn.sqhk.co/kiribikiv/IijgDjg/where_is_my_dvd_queue_on_netflix_app.pdfIn PDF document text
    • http://zituwuwobilel.22web.org/minimisation_of_boolean_function.pdfIn PDF document text
    • https://cdn.sqhk.co/fugovigul/fhjhii9/download_hoverboard_rush.pdfIn PDF document text
    • https://wovovude.weebly.com/uploads/1/3/1/3/131397940/32c0cb78ef.pdfIn PDF document text
    • http://guketaz.iblogger.org/2019_tamil_new_movies_free.pdfIn PDF document text
    • https://mibugekokedepi.weebly.com/uploads/1/3/2/6/132682655/goval.pdfIn PDF document text
    • https://gusefokujugox.weebly.com/uploads/1/3/4/0/134040973/zemotilulipoja.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/waxapoz/ageing_report_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/the_hunger_games_mockingjay_part_2_movie_download_in_hindi_720p.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/sesorabinakut.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/xujemumibe.pdfIn PDF document text
    • http://pogixade.rf.gd/37473371264.pdfIn PDF document text
    • https://21a67f6d-2aea-439f-a910-ed4feb6be009.filesusr.com/ugd/173616_e2ebb58c58c14812a1cd83b2350845a9.pdf?index=trueIn PDF document text
    • https://2ddc7431-ff91-46e9-9708-195efd6cc195.filesusr.com/ugd/ffe0d3_04d9e88ff7ca4263836f06b23706f9f0.pdf?index=trueIn PDF document text
    • https://77701ba7-c5ad-4750-ab17-5b03548f7fc0.filesusr.com/ugd/9a242c_c34e5a8fbe0e4969a1e3e4b3b2db5bfe.pdf?index=trueIn PDF document text
    • https://7980b0ff-2efe-48f4-a442-6c87bca80713.filesusr.com/ugd/9bd8c3_06ddbd0d7b7840fa9ef63b95aa916bc0.pdf?index=trueIn PDF document text
    • http://mibavened.rf.gd/kanso_sound_processor_accessories.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_off0000f7c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C8 5180 bytes
SHA-256: fcca5df51f2a5bb5b1301a611184ccf8f3ab278295e5b43a47d323386b610f78
font_01_sfnt_off0001095b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1095B 12220 bytes
SHA-256: ddcb48401dbb1e1e79f3a04839358e52f1159c107001a6ffafe6d254ec61e601

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