Malicious PDF — malware analysis report

Static analysis result for SHA-256 29aeade90f6b7e4e…

MALICIOUS

PDF

78.6 KB Created: 2021-09-21 01:12:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ade016a69c02c976959d5c26cc5245ed SHA-1: 334436470d66de9a2f7ad931b8aa5170fa221442 SHA-256: 29aeade90f6b7e4ea46307b5d9791ea911799efe9686cffc27189a9b54d6dbf6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a 'download button' heuristic and numerous external URLs, including one pointing to a compromised WordPress upload, suggests a phishing or malware distribution scheme. The document likely serves as a lure to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://allytemp.ru/uplcv?utm_term=naruto+senki+road+to+ninja+apk+download PDF link annotation
    • https://aczv.fr/userfiles/file/3045568490.pdfIn PDF document text
    • http://giorgimpianti.com/userfiles/file/pufijeba.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613130bf13675---zezerorekevuzevejafobura.pdfIn PDF document text
    • https://conrays.ru/f/data/birunek.pdfIn PDF document text
    • http://panova-art.com/files/file/zilivajivunosudud.pdfIn PDF document text
    • https://onlineadda.net/ckfinder/userfiles/files/34879145844.pdfIn PDF document text
    • https://benmoonpharma.com/userfiles/file/82885029438.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/161391663396e6---24158856144.pdfIn PDF document text
    • https://dunaweb.co/bg_image/files/tikugeb.pdfIn PDF document text
    • https://yuanfuconstruction.com/ckfinder/upload/files/57454772284.pdfIn PDF document text
    • http://szm.hu/userfiles/file/korek.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1614161c92e00e---33431644771.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614166ed84ae7---69619340024.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1614161e81fb1e---dagowogunifu.pdfIn PDF document text
    • https://nucamsa.es/userfiles/files/lefasegamefiliwa.pdfIn PDF document text
    • https://nsaimmigration.com/userfiles/file/81432677177.pdfIn PDF document text
    • http://riccaassociati.eu/userfiles/files/72369875564.pdfIn PDF document text
    • https://jills.reviewz.eu/app/webroot/files/userfiles/files/27578457706.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/kd5g62rbj6932miiscpl9gp7j5/94300047244.pdfIn PDF document text
    • http://topup-fight.com/ckfinder/userfiles/files/13709603939.pdfIn PDF document text
    • http://synergytaekwondo.com/click2buy_newp/userfiles/file/6617212863.pdfIn PDF document text
    • https://sharedsynergy.com/userfiles/file/tepof.pdfIn PDF document text
    • https://norservis.com/files/files/fekegi.pdfIn PDF document text
    • http://iraneto.com/basefile/iranetocom/files/48396091592.pdfIn PDF document text
    • http://hotechike.com/files/files/kokoduzawok.pdfIn PDF document text
    • http://wonikquartz.com/upload/editor/file/1630663519.pdfIn PDF document text
    • https://www.rt9.rspo.org/ckfinder/userfiles/files/68922614794.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_off0000ce8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE8E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e6a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A5 10772 bytes
SHA-256: 8dc4701177d452f9e981ee4ce770965a18604c2f3cdbe405dda4fc231a1c7cb6
font_02_sfnt_off0000ff92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF92 17184 bytes
SHA-256: 188b3c37af9b145eab9b3e8bc655256f26b88aa158ee2b98dd5f148b3a3ff57a

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