Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a529d11978e0fe3…

MALICIOUS

PDF

69.7 KB Created: 2021-09-27 15:13:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 074305e572a529644583c1e2c92eb596 SHA-1: dfea72f560da464a4f7ec8a3ff83de6a4fff9f67 SHA-256: 0a529d11978e0fe3e18cda562118aafe8b8f1dcaf5200b75e75b05e67142dcb4
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and ML classifiers, exhibiting characteristics of a phishing lure. It contains a screenshot image designed to trick users into clicking embedded links, which point to various domains, including compromised WordPress uploads and disposable hosting. The primary link, 'https://nomylo.ru/uplcv?utm_term=plants+vs+zombies+2+hacks+ios', suggests a lure related to game hacks, likely leading to further malicious content or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 https://nomylo.ru/uplcv?utm_term=plants+vs+zombies+2+hacks+ios PDF link annotation
    • http://7166867.ru/ckfinder/userfiles/files/26460877250.pdfIn PDF document text
    • http://designbyjoseph.com/uploads/File/gekukelidesaw.pdfIn PDF document text
    • http://toyotarent.hk/FileData/ckfinder/files/20210905_C9916032F8313A89.pdfIn PDF document text
    • https://www.sterlingsez.com/ckfinder/userfiles/files/65000362451.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/161322504e9aed---zugixorutarikepofugirax.pdfIn PDF document text
    • http://www.de.ruben.pl/ckfinder/userfiles/files/4629622689.pdfIn PDF document text
    • http://softwaretesting.kr/club/data/userfiles/file/20210924201945.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/45bfc6f3de7e58d6c58c0797a206e7a6/48574829161.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/1mjtveql7888oou7b471olpbfr/jurikekowumomo.pdfIn PDF document text
    • http://ultrabeauty-ff.ru/userfiles/file/nuwerexavanafol.pdfIn PDF document text
    • http://terezszilvia.com/images/uploaded/file/tabobukavot.pdfIn PDF document text
    • https://aymfly.com/aym_image/files/15428722060.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/49b9a5719745c607e0c2c8aae87bc27c/2656189915.pdfIn PDF document text
    • http://zhuoer.ltd/userfiles/file/riteguzovobugoxabexax.pdfIn PDF document text
    • http://gbfrjournal.org/pds/userfiles/files/97479055655.pdfIn PDF document text
    • http://iaestedresden.de/userfiles/file/23520328313.pdfIn PDF document text
    • http://madonnina.info/userfiles/files/gipiwenipoxas.pdfIn PDF document text
    • http://pyramidplaster.com/file_media/file_image/file/64221670720.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614785d0ee2d3---jifalob.pdfIn PDF document text
    • https://ever-progress.dacola.com/upload/files/peramitu.pdfIn PDF document text
    • https://mamap.in/ci/userfiles/files/rilajo.pdfIn PDF document text
    • https://ispartaorganizasyon.com/ckfinder/upload/files/kojipagulawubo.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614432861b1bf---70332092050.pdfIn PDF document text
    • https://burlingame.com/wysiwygfiles/file/genajilufononuvuda.pdfIn PDF document text
    • https://rt9.rspo.org/ckfinder/userfiles/files/pavikarobumatoxogum.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://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_off0000b3ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cbff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBFF 13892 bytes
SHA-256: a329594a8a82220adc582b8671c33873a2ebda3ebcae7bbb343ab6cf996d9e33
font_02_sfnt_off0000ee65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE65 10872 bytes
SHA-256: e2dd4f9df13317156c157ed96896acf2415bbad9e8c0d318fb16b9d4c22c50b2

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