Malicious PDF — malware analysis report

Static analysis result for SHA-256 00f9835304947faf…

MALICIOUS

PDF

94.4 KB Created: 2021-07-03 06:11:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 73d4538c1393720de608757958e49a89 SHA-1: f004878277ce7a8aaf4115e12ceae6f776fc9f45 SHA-256: 00f9835304947faf2e3c76a883c07430844ddf1fede2bfee810c8dfbe60e724f
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to websites hosted on compromised CMS platforms or utilize disposable hosting, indicating a link farm designed to direct users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 6

  • 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.
  • 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://groupunsur4.com/contents//files/37164175629.pdf In PDF document text
    • http://parkhighclassof60.com/clients/871169/File/vujogokazurajutifugubak.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/timuwidevosura.pdfIn PDF document text
    • https://aimtronu.org/userfiles/file/tenode.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/tibonuzeg.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/f3ec7f6eca24cb554036ce2d8724a029/mikuzevasulibiwujileset.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607df4c718de3---befugu.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/15c13397469492c91a7bacb1a4add536/kifelajegajedonasopagaki.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074fec2eb0af---vekibuwerinupadiza.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/a98ddbe46df1ea2d31c2004662dfd2a9/labumapuzuladebowanov.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089cf8969198---sowebinupalujebi.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/3331156edea435829d64030304100700/rodarobivalu.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fa7be0ccb3---632398124.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5e48958b9f---benukemalapamenu.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/16072eab15af9e---potepipuguvegigirutep.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/ffb9f5b263b0122675d354af69a35fd7/30964206969.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/71395793015.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a150fab5978---55021018276.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/0c61d85dfcceec3782c78acb6696c62f/43827726951.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8282b0c68d---gipivimemokapuzatagu.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1609a324ab6f0c---melabozakulavopa.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/d7a6be77571445ac4c30cc56e2591409/melaxelowuwoxexuz.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/a479ec1f94d6fe2bd2432aa5255ad569/nexinajumovukapifekaz.pdfIn PDF document text
    • https://cmsschoolkg.org/userfiles/file/manofuzow.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bb4f77877c9---tufugetawogebusuf.pdfIn PDF document text
    • http://31kouqiang.com/userfiles/file/1624421704.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/volopefebisazosorezabi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=seminar+topics+for+computer+engineering+studentsPDF 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_off000109e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E2 11092 bytes
SHA-256: 7f5b43daa0e03e444fd4c8748287c5a57b94ed2461b9e27af64832d2490c9d69
font_01_sfnt_off0001237c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1237C 18244 bytes
SHA-256: 02a1bf98d02a592ded807143dbb9bb4ac239476144efa1b471d9eacf62f4531e
font_02_sfnt_off00015376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15376 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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