Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bfb12d20554cf48…

MALICIOUS

PDF

76.6 KB Created: 2021-03-07 07:36:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: d478da14d9226063affc31e3b7e9a068 SHA-1: b4a9e94505037ed80595a70838e12a838bef2892 SHA-256: 8bfb12d20554cf48f6272fd873f8ec509fe010b8879a892ac1c9d4c86cee66b1
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://crophysi.ru/award?keyword=where+can+i+pay+my+credit+one+bank+bill'. This URL is likely part of a phishing campaign or a malware distribution scheme. The document body, though heavily obfuscated, contains text related to bill payment, reinforcing the phishing lure. The presence of numerous external PDF links, many of which are benign, suggests a link farm used to obscure the malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/award?keyword=where+can+i+pay+my+credit+one+bank+bill In PDF document text
    • https://cdn.sqhk.co/vorebilifi/hhGicun/sparkchess_application_free_download.pdfIn PDF document text
    • https://lufukosiresefo.weebly.com/uploads/1/3/4/7/134707539/075c1153de97ac.pdfIn PDF document text
    • https://cdn.sqhk.co/vonezositixi/59gjujh/44864931945.pdfIn PDF document text
    • https://tedipoji.weebly.com/uploads/1/3/1/4/131408178/ed5872ea92659.pdfIn PDF document text
    • http://lomidal.mygamesonline.org/nusufeli.pdfIn PDF document text
    • http://gakawisogafuga.mygamesonline.org/resistance_bands_workout_for_back_fat.pdfIn PDF document text
    • http://axacheat4.xyz/94757521485lvrnj.pdfIn PDF document text
    • http://joxitikoki.getenjoyment.net/unity_technologies_stock_forecast_2025.pdfIn PDF document text
    • http://idealica-co.site/xoliligawiwezopapifabilue7ui6.pdfIn PDF document text
    • http://pokemonrivals.online/the_witcher_book_series_epub_downloaymm3l.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/pegek/shutter_movie_filmywap.pdfIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/libertarian_party_platform_of_texas.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/manchester_united_fixtures_android_calendar.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/66962388196.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/is_there_any_android_os_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/iim_a_audited_placement_report.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/kupuz.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/god_of_war_ps4_trophies_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/dell_brocade_300_firmware.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/vaxiravemuwunako.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_off0000eebd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBD 5452 bytes
SHA-256: c70ef369579cf0c46bca091599af0cdd5634bea8c6f3b0fa96457c5e2d57d54c
font_01_sfnt_off0001012d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1012D 10396 bytes
SHA-256: 5f481571159528f8b9c33fa56e74eef19246f224cbd8fdc5c8db46d9e017d61d

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