Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed0325839365da1f…

MALICIOUS

PDF

83.4 KB Created: 2021-09-14 04:01:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1502c90fa48875979844a285c107031a SHA-1: 0dfb01897f35b90a370d17a956c1dbf3fa6400e4 SHA-256: ed0325839365da1f777a38d43a58a0d97f447558d7bd2ee893d4f500655ff9fe
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains a link farm pointing to multiple domains, some of which are hosted on compromised CMS upload storage. The presence of external URIs and the overall structure suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://sarkar.ie/userfiles/file/86967924125.pdf In PDF document text
    • http://gianniarnaudo.com/userfiles/files/xofekonokoxidogig.pdfIn PDF document text
    • http://ksiclubcom.ksiclub.org/svnprojects/DHD/Source/images/files/nigojijewavamafutizanad.pdfIn PDF document text
    • https://www.champagne-auge-dascier.com/ckfinder/userfiles/files/13460453593.pdfIn PDF document text
    • https://foodsafebox.com/ckfinder/userfiles/files/zexiwinuzix.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/lizibizijalepikaderumiru.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/53302738590.pdfIn PDF document text
    • https://doublehair.center/upload/ckfinder/files/72812055042.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/qs24v8v6uqsqbcvrr1dm7r5lqf/11989794529.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.com/userfiles/file/vuwaremani.pdfIn PDF document text
    • http://client.diffuse.info/files/75701858306.pdfIn PDF document text
    • http://popmetre.com/news/files/68818354177.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/9ec63c0e5cdb061d093e30a595a508e8/zavesetob.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/mlj1fp1jbrffldijc6ks5o1biv/11636380094.pdfIn PDF document text
    • http://hotechike.com/files/files/76294467730.pdfIn PDF document text
    • https://alzubidi.com/userfiles/files/98451022314.pdfIn PDF document text
    • https://natyabio.com/uploadfiles/80565859434.pdfIn PDF document text
    • https://thefertilizerequipment.com/d/files/wimob.pdfIn PDF document text
    • http://thenext.pk/userfiles/files/9468371282.pdfIn PDF document text
    • http://dishandspoonproductions.com/ckfinder/userfiles/files/pupekufidano.pdfIn PDF document text
    • http://scro.ru/pic/file/jiwudu.pdfIn PDF document text
    • http://quantri.thaisonpalacehotel.com/upload/files/13987706489.pdfIn PDF document text
    • https://mandarinusa.com/userfiles/file/1631015414.pdfIn PDF document text
    • https://savitravel.ro/ckfinder/userfiles/files/13707032332.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=gemba+kaizen+masaaki+imai+pdfPDF 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_off0000dc41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC41 19132 bytes
SHA-256: 47292ea2d4d66330b10d60d52748c4ad1061d0867e9748b9ed8a86ed9032e18f
font_01_sfnt_off00010e04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E04 10624 bytes
SHA-256: ffdc2105de49228be7267b460e0c546c79034d86d0d08171042c2129b6726c1b
font_02_sfnt_off00012621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12621 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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