Malicious PDF — malware analysis report

Static analysis result for SHA-256 e07ebe22686c1f0d…

MALICIOUS

PDF

76.6 KB Created: 2021-04-02 01:26:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02dda78878433c1483e0a56ea813a16b SHA-1: e3f2d11c819829ab3b1a0e83b7d0cc11d12a0107 SHA-256: e07ebe22686c1f0d139a478ca7a3b1fda2f06e140a5fdd0065f728a7b5778ebf
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are disguised as legitimate PDF files, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links point towards a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/strik?utm_term=how+to+update+nexus+10+manually
    • https://dilipifoson.weebly.com/uploads/1/3/1/0/131070096/gudovuguwum-gofopabo-tadafireb-sebubipekitiwad.pdf
    • https://wopuxikejixup.weebly.com/uploads/1/3/1/8/131856699/3379442.pdf
    • http://firstsecu-paypal.com/zezujavovuvezek1nzv5.pdf
    • http://milano-moda.space/present_simple_text_for_beginners9af85.pdf
    • http://womans30planet.com/77383305594v8kan.pdf
    • https://nukubutanedun.weebly.com/uploads/1/3/5/3/135309192/687e859fc.pdf
    • http://peuer.xyz/kenmore_elite_washer_error_codeshuvg1.pdf
    • https://xufefizomuziz.weebly.com/uploads/1/3/5/3/135346589/gutewivodupe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/memexelu/cute_wallpaper_pic.pdf
    • https://s3.amazonaws.com/wujodibu/wyrd_sisters_audiobook.pdf
    • http://tovebaw.rf.gd/89435366369.pdf
    • http://sirilamezowi.epizy.com/english_synonyms_with_examples.pdf
    • https://s3.amazonaws.com/tufujifinobiro/harry_potter_books_paperback_box_set.pdf
    • https://s3.amazonaws.com/fedojigudaj/kusejeke.pdf
    • https://s3.amazonaws.com/jefazaxal/which_laptop_is_best_under_20000.pdf
    • https://s3.amazonaws.com/jadere/canon_mx430_treiber_download.pdf
    • https://s3.amazonaws.com/dugibabafod/derechos_humanos_en_ingles_10.pdf
    • http://faxunarin.epizy.com/how_does_reading_support_writing.pdf
    • https://s3.amazonaws.com/kesumasaka/1565599648.pdf
    • https://s3.amazonaws.com/wuwabobujasivor/reasons_why_school_uniforms_should_be_banned.pdf
    • https://s3.amazonaws.com/wukevirenesu/ark_survival_evolved_android_apk_file.pdf
    • https://s3.amazonaws.com/nonipesikiri/banjo_kazooie_bubblegloop_swamp_guide.pdf
    • https://s3.amazonaws.com/gowebabuxogiro/how_to_use_cooks_12_cup_programmable_coffee_maker.pdf
    • https://s3.amazonaws.com/jazuravazaguz/cpr_certification_test_study_guide.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebe5.bin
5f5c6f26dffe4f29e4bd3254b394374310c19e98c16f9370438d20d6eee4a348		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE5 5424 bytes
font_01_sfnt_off0000fe62.bin
ac6186794346f6254c360eec51359709c23882ed95dcf9dcacc1a98c8c667cfa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE62 11248 bytes

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