Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aec346ecc5e54ae…

MALICIOUS

PDF

82.3 KB Created: 2021-09-18 14:10:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: bf1cfb2f83f6e3eda98ee2835c189bbe SHA-1: e359b3cf641dab18f5cd4d25b9ebaf98a5c05b18 SHA-256: 0aec346ecc5e54aebd1565d79a7dde0c7ff2b1d4a7e566fe13bea2d7f0c1335c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised CMS upload storage and disposable hosting, suggesting a link farm designed to distribute malware. The presence of a 'download hitman sniper mod apk' URL in the metadata further indicates a lure for potentially unwanted or malicious software. While no scripts were directly extracted, the PDF structure and link farm heuristics strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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 link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://totoquynhhuong.com/upload/files/18610058319.pdf In PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/435939308590c4b4a507289e2651eae9/pumipafatafixim.pdfIn PDF document text
    • http://top1np.com/ckfinder/userfiles/files/posaxezabarodukikokavurek.pdfIn PDF document text
    • http://slxiang.com/v15/Upload/file/202196205174115.pdfIn PDF document text
    • https://transmar.biz/ckfinder/userfiles/files/9237328186.pdfIn PDF document text
    • http://studio70.eu/userfiles/files/misirafupe.pdfIn PDF document text
    • http://aedjtjdshbf.pretty-match.com/upload/files/53498976482.pdfIn PDF document text
    • http://www.jokilaaksonratsastajat.fi/file/53549382070.pdfIn PDF document text
    • http://geojeoceanhotel.com/userfiles/file/20210905031542.pdfIn PDF document text
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/gumut.pdfIn PDF document text
    • https://behagi.eus/files/galeria/files/45968083432.pdfIn PDF document text
    • http://urjabatteries.in/userfiles/file/76806960371.pdfIn PDF document text
    • https://liho.cz/UserFiles/File/9057404724.pdfIn PDF document text
    • http://slmj8.com/data/userfiles/files/pavomipipinaje.pdfIn PDF document text
    • https://jajugroup.com/ckfinder/userfiles/files/xazovi.pdfIn PDF document text
    • http://ukwoodrecycling.com/userfiles/files/12777105855.pdfIn PDF document text
    • https://wfca-czech.cz/temp/userfiles/files/14302213754.pdfIn PDF document text
    • http://worldnaturalfood.com/image/upload/File/zupobapipofixosudelo.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16136909eb9d95---60431704233.pdfIn PDF document text
    • https://4wheelchile.cl/admin/uploads/file/41758522669.pdfIn PDF document text
    • https://sportsslife.net/upload/ckfinder/files/75620049258.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/b0a6faf202b3269e4eae3116b2ec0d85/43474419566.pdfIn PDF document text
    • http://whuntex.ru/userfiles/file/menadoful.pdfIn PDF document text
    • http://siripanyalamphun.com/user_img/files/seforoj.pdfIn PDF document text
    • https://dermatologie-francophone.com/userfiles/file/70601640755.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=download+hitman+sniper+mod+apkPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B3 16888 bytes
SHA-256: 3d89f0f4a8f004799264372d25b3d296fa75ba99c46d551b76627e756e49dde8
font_02_sfnt_off000122a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122A0 10836 bytes
SHA-256: 527ba364e78e12b2895338fa899853632379ccd5cb3df86463913aa0011dd86c

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