Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe3fa01a71dcaedc…

MALICIOUS

PDF

77.9 KB Created: 2021-09-12 03:32:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 2d6df552e33975ffdf5cf8e6ec3235a0 SHA-1: 987a12ae73e2ba45f3781054de8f470e57f1550f SHA-256: fe3fa01a71dcaedcdbef7271fad25567e4483b6ae2cdbac6f0122ed3e6339292
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a link farm pointing to various websites, some of which appear to be compromised CMS uploads, suggesting an attempt to host malicious content or redirect users. The presence of a 'download button' heuristic further supports the lure-based attack pattern. No scripts were extracted, but the overall structure and heuristics point to a malicious document designed to trick users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://www.paseppe.gr/ckfinder/userfiles/files/gakikilovujef.pdf In PDF document text
    • http://geerhannutpourreussir.be/docs/upload/files/dagumexezalofirozofosis.pdfIn PDF document text
    • http://ayurveda-shiatsu-nice.com/upload/files/vigejedorizafepaburefot.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/161357a409d5d7---85529344415.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/61166932722.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/timajiwinalabe.pdfIn PDF document text
    • http://elskup.pl/images/assets/file/14687321694.pdfIn PDF document text
    • http://ms-domino.eu/images/file/files/31016468462.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/ce60511bb55e491ac667421c5be5cea9/lodezetinetigixugodutodip.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/e1702f277b5da2b530c336d80bbc64ad/wenimogiva.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613478c16f133---12184252681.pdfIn PDF document text
    • http://musicpark-live.com/userfiles/file/87918511765.pdfIn PDF document text
    • https://bloomeng.com/uploads/45582960495.pdfIn PDF document text
    • http://abnicum.ru/files/file/sarekaxipuvutexutisa.pdfIn PDF document text
    • http://xn--9w3b270a7kf.kr/data/editor/file/97938039453.pdfIn PDF document text
    • https://aspit.ro/imagini_ws/64398739745.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210904210145509.pdfIn PDF document text
    • http://www.siphonicflowmandiri.com/upload/files/zesome.pdfIn PDF document text
    • http://xn----gtbercbfedtm3b.xn--p1ai/admin/ckfinder/userfiles/files/gozatexuzupazaresi.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/9a1685cd8ec173453716449d82d9d371/73020470055.pdfIn PDF document text
    • http://asorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/juxorekixebelunu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=gloud+games+2017+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_off0000cd8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD8F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e5a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A1 16652 bytes
SHA-256: 09c4b4d8ce8fc28e51c073c5da4fa50d4687ac1850d99aa742bbb0f7909b9c93
font_02_sfnt_off000110cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110CD 10916 bytes
SHA-256: 6909078b53b156062a602a0f50bd969a1d2caab2673d685106b5f488539b5c54

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