Malicious PDF — malware analysis report

Static analysis result for SHA-256 97e0d35092a5cee2…

MALICIOUS

PDF

80.8 KB Created: 2021-09-15 16:12:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7f21215b1ba291b7ab1a077e00e60493 SHA-1: 5276d1dc57cd577840f20aa5e4ab1d12ba834bea SHA-256: 97e0d35092a5cee22be0a3e27a9a84c4b84581434e46d5e9b6376921b40a522a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links, many hosted on compromised CMS upload storage and disposable hosting, suggesting a link farm designed to redirect users. The presence of urgency lures in the document body further supports a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious intent, likely to lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://www.keizerco.nl/userFiles/file/84146869704.pdf In PDF document text
    • https://408of53crownstreet.com/assets/media/files/juvaziguzipugezakek.pdfIn PDF document text
    • https://infiniteprospects.com/FCKeditor/file/52500614613.pdfIn PDF document text
    • https://bangvetthuong.com/luutru/files/46853964663.pdfIn PDF document text
    • https://bursakaynak.net/userfiles/file/66699505518.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/55de1d2aae33eb462f698f2ed10ef2fe/49623627827.pdfIn PDF document text
    • http://hatdesechia.com/storage/ckfinder/files/savuduxarebunojebalon.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/477e8ea4d520f1b335b20ad6e54f4408/4914073981.pdfIn PDF document text
    • http://snap-drone.com/userfiles/file/numagel.pdfIn PDF document text
    • https://tonmathunglan.vn/upload/files/89623477256.pdfIn PDF document text
    • http://thietbimaugiao.vn/Images_upload/files/dekojaroru.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/46nlvg6amo7pkfbmps58c6lji4/61426212644.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc89d4f92a---gatiranubilitijuvi.pdfIn PDF document text
    • https://aalatour.com/basefile/b2caalatourcom/files/xusorowujozukatusixawin.pdfIn PDF document text
    • http://huyndaicaudien.com/upload/files/zixilekaxefubakozexolikel.pdfIn PDF document text
    • https://imagebrandstudio.com/userfiles/file/46934168347.pdfIn PDF document text
    • https://rwd1.thadv.com/upload/files/turugegi.pdfIn PDF document text
    • http://conganbacgiang.vn/app/webroot/uploads/files/15991950453.pdfIn PDF document text
    • http://marine-inox.com/i/File/61985478877.pdfIn PDF document text
    • http://hondatayho.top/img-ngocbao/files/misogivotedudufolozepu.pdfIn PDF document text
    • http://kondicionery-dzerzhinskij.ru/upload_picture/file/xesisopemavudodowipe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=news+app+tech+private+instagramPDF 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_off0000d95b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD95B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f16d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16D 16908 bytes
SHA-256: 93258823c0836d344250c6572aca7bf1820e610d222f193c3e2b4061a316b48b
font_02_sfnt_off00011d62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D62 10784 bytes
SHA-256: e07acf3538767c382a2029d3a931c8c5820179a9c125849d340c92a220e118a8

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