Malicious PDF — malware analysis report

Static analysis result for SHA-256 19d124676c3a4686…

MALICIOUS

PDF

82.2 KB Created: 2021-09-18 23:49:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3bcbad492c9d1c3b1db30c037bfd4bc1 SHA-1: 030541bf52ebb912b9c471ee583a98a301d6eb2e SHA-256: 19d124676c3a4686f503ab6a578e77bb9023a92508243971249eec71b4a4261d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The presence of numerous external URIs, including one that impersonates a Minecraft download, strongly suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded links indicate an intent to redirect users to malicious sites, likely for further payload delivery or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cructi.ru/uplcv?utm_term=minecraft+download+free+android+latest+version PDF link annotation
    • http://szyqjsj.com/UploadFile/file/20210918070855513.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec5017f2c2---vafebuv.pdfIn PDF document text
    • http://meyergarden.com/ckfinder/userfiles/files/paziwa.pdfIn PDF document text
    • http://yomamasushitogo.com/uploads/files/78487900056.pdfIn PDF document text
    • http://www.rafaellucenaehijos.com/ckfinder/userfiles/files/xerefewuselapekeboteto.pdfIn PDF document text
    • https://liur-krd.ru/userfiles/file/vofamudifod.pdfIn PDF document text
    • http://naturestuff.nl/siteimages/file/bulavodiponinalumogige.pdfIn PDF document text
    • http://w-f-l.de/user_img/file/darekesijutakisoxuxaneli.pdfIn PDF document text
    • https://giriconsultancy.com/content_files/files/gevibugisitilazejojope.pdfIn PDF document text
    • http://dotbamboo.com/file_media/file_image/file/bixomamogasikijateti.pdfIn PDF document text
    • http://farmaciafoglia.eu/userfiles/files/19082542937.pdfIn PDF document text
    • http://harmonie-avion.fr/actualite/files/lonikufuwizuri.pdfIn PDF document text
    • https://asiantms.com/ckfinder/userfiles/files/gukabeneverefol.pdfIn PDF document text
    • http://vivatbacchus.hu/files/file/nomasexisarotakidesafax.pdfIn PDF document text
    • https://luatkhangthai.vn/upload/fck/file/kowovutubemisajowuzalo.pdfIn PDF document text
    • https://euronet.stonavka.cz/webpagebuilder/ckfinder/userfiles/files/xigulosimivopewos.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/27668621931.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131bdb860b49---25987331835.pdfIn PDF document text
    • http://www.polni.si/Images/files/refinusifinawiwefe.pdfIn PDF document text
    • http://vectorma.ru/uploads/assets/file/40181249643.pdfIn PDF document text
    • http://christ-china.com/filespath/files/20210909021256.pdfIn PDF document text
    • https://groupburuemas2.com/contents/files/70340216887.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_off0000de9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9B 10612 bytes
SHA-256: 0930eac22a4b091032ece6eff7ed816a52b5c0a6917ebb35d67646159e7e9ff8
font_01_sfnt_off0000f712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF712 16932 bytes
SHA-256: 3a4096f5c0fd2e2252f8f6359cb0bacff5afbd2eaab7828f1c17658d80598072
font_02_sfnt_off000122d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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