Malicious PDF — malware analysis report

Static analysis result for SHA-256 25647ac14cd2873c…

MALICIOUS

PDF

85.8 KB Created: 2021-09-18 20:56:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: d2aa3112f4ce6dc3e2811ad1e414eff6 SHA-1: f798a19301385a60462ff4f522c9247b9273beca SHA-256: 25647ac14cd2873c620fc405c932fc5d39e3613d194fa9cb55e1fd07ddb2a7d1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://catamma.ru/uplcv?utm_term=iphone+still+sending+imessage+to+android PDF link annotation
    • http://mylodge-naoshima.com/images/blog/file/vixujokusagiwaz.pdfIn PDF document text
    • http://tksvolga.ru/userfiles/file/51645512254.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/161417cedac27a---ganise.pdfIn PDF document text
    • https://conexusinternational.com/ckfinder/userfiles/file/23325708460.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/9adb53ece16f0ee6a62fd968edb9dc15/zumitijarabejawapokejiw.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/4l1ijtdhh6l7vak8ojlltnsgrj/55518254248.pdfIn PDF document text
    • http://naturalmis.com/userfiles/file/duwozafikafebotalof.pdfIn PDF document text
    • http://chanakyaaerospacedefence.com/userfiles/file/gixexupibojexumogugonasiw.pdfIn PDF document text
    • http://clinivetmadonnadirosa.eu/userfiles/files/bodenoxoli.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613c6c0607e9c---rebupo.pdfIn PDF document text
    • http://seteo-dechets.com/images/file/93053512096.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/161374805a568d---letajudatiwapapobon.pdfIn PDF document text
    • https://doxity.ro/ckfinder/userfiles/files/ruratenetaduj.pdfIn PDF document text
    • http://americansemitruckparts.com/d/files/rokiguvanugabibagufefum.pdfIn PDF document text
    • http://soluzionebenessere.eu/userfiles/files/woxipezawegawufajamofone.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/418dc8da555534af23fc3ace0ce2a25a/xotadojepe.pdfIn PDF document text
    • https://next-engineering.com/userfiles/files/91627189697.pdfIn PDF document text
    • http://dailygameresult.com/editor/UserFiles2/files/samoxawedosa.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/userfiles/file/jutedeg.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161305d8812c58---lozovawotisajodakosidub.pdfIn PDF document text
    • https://bucatariizidite.ro/printuri-fi/files/18399594928.pdfIn PDF document text
    • http://svatba-emi.com/uploads/pages/files/lozebatuwodiraguvala.pdfIn PDF document text
    • http://auto-rad.pl/userfiles/file/10514861943.pdfIn PDF document text
    • https://bharatiyabhashaparishad.org/ckfinder/userfiles/files/lejonimedarojap.pdfIn PDF document text
    • http://www.hzkontejnery.cz/ckfinder/userfiles/files/96125550678.pdfIn PDF document text
    • http://chataphan.com/file_media/file_image/file/9390251404.pdfIn PDF document text
    • 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_off0000e959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE959 10788 bytes
SHA-256: 37600dddc1857e71026a7d5edd8b97615ad49edcc7e51744dfba23e8b5d22c88
font_01_sfnt_off000101bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101BC 18348 bytes
SHA-256: 882377857e671709e79a7f49de0ddce02ad5c0a082895f117a869c5e6e14f2d1
font_02_sfnt_off00013181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13181 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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