Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6aeb89b0d3bea44…

MALICIOUS

PDF

83.7 KB Created: 2021-09-02 03:01:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 54be614ac2d25ed05a91e718a643b153 SHA-1: af78337e8a523c1c0c99bc4938e824e6cbf0953c SHA-256: d6aeb89b0d3bea44eac87c8811f546757adf2f80345887889bb2a76a80e9ad36
164 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised websites and disposable hosting domains, likely to facilitate the download of further malicious content. The presence of numerous URLs associated with compromised CMS uploads and link farms strongly suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://abwalabamaave.com/uploads/files/97602805192.pdf In PDF document text
    • http://lasfyy.com/uploadfile/file/20210707002120729.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608032be28418---42311109115.pdfIn PDF document text
    • http://essentielles-theater.de/UserFiles/File/92603006290.pdfIn PDF document text
    • http://integrotech.com/zdjecia/file/36678047417.pdfIn PDF document text
    • http://goforthegreengolfpools.com/userfiles/file/birutikid.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/3ff1bdbf5c76f4fdb043a53a8193fccb/nefutugudoru.pdfIn PDF document text
    • https://juegosinflablesarizona.com/files/fusizasimesujafijuni.pdfIn PDF document text
    • http://firegallery.ru/img/upload/xufijofatovinilemapixig.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/go1uoageqvda8l0mbk1ljmacoo/vukizidazezolurogirogi.pdfIn PDF document text
    • https://turasmobilya.com/img/editor/image/file/11268421425.pdfIn PDF document text
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/r69f9c445dki0v8c01slj6lrfj/wumopowose.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/69217408086.pdfIn PDF document text
    • http://cybernet.asia/UserFiles/File/35463918141.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160823162ad7e0---90314526231.pdfIn PDF document text
    • http://nutrizionisti.eu/public/thread/risorse/file/nidubesorabod.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9505a7eb7---74315071676.pdfIn PDF document text
    • https://delta-relay.be/userfiles/file/8967924879.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1611b08006956e---voludebisedowigotuxifi.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/4aecf76b238901a3f76b33059f189722/79321176755.pdfIn PDF document text
    • http://cephedanismani.com/images/pages/file/629391504.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/41869dbff0bd2111819300ea91e1c8cd/70356325066.pdfIn PDF document text
    • https://pfollowers.com/ci/userfiles/files/nujev.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608456be0b009---gigemizojoli.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160df8df3c1787---72823065149.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+change+the+address+of+my+car+registrationPDF 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_off0000e330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE330 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB47 11068 bytes
SHA-256: 9098e3a9c9356071b06a0de5ecf817965f1e5f9f515c2158feab229df50656c1
font_02_sfnt_off000114bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114BC 16524 bytes
SHA-256: b4db69bc837761d61b794a3c0164d9e16ff9caebc6895aa0c127c0f1fbf5e444

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