Malicious PDF — malware analysis report

Static analysis result for SHA-256 fede8ae839693410…

MALICIOUS

PDF

81.6 KB Created: 2021-09-18 06:07:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: cb0cacef1b7f4b0ccd0704ca1cacac22 SHA-1: 1b600424d50204af8080728cd805521aa2e377b9 SHA-256: fede8ae83969341025722cdfe50685dbbe9b9e2e7f5f4de1a9a6ed75ba02c954
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised WordPress sites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of a URL with 'root android 5.1 without pc' suggests a lure for potentially malicious software or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://coretry.ru/uplcv?utm_term=root+android+5.1+without+pc PDF link annotation
    • http://piqiso.ru/userfiles/file/bilow.pdfIn PDF document text
    • http://leeandrewdavison.com/download/69226331201.pdfIn PDF document text
    • http://shanghaicruiseparty.com/uploads/file/42625314110.pdfIn PDF document text
    • http://easy-sleep24.de/shop/images/editorfiles/file/8192106527.pdfIn PDF document text
    • http://eco-versute.com/app/webroot/ckfinder/userfiles/files/wimuretetidoxifofeven.pdfIn PDF document text
    • http://galsabino.it/userfiles/files/92459661257.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ojan3ae1fh8n5uvjtaeiag9pf0/rebibigoguxi.pdfIn PDF document text
    • https://hanoihome.net/img_duhoc/files/sigomubuzujifupaxod.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/pizediked.pdfIn PDF document text
    • http://protetyka-lublin.com/images/wyswig_images/file/46132064750.pdfIn PDF document text
    • http://antropolog.ru/userfiles/file/92086165387.pdfIn PDF document text
    • http://quesnelbusinessnetwork.ca/userfiles/file/92322457141.pdfIn PDF document text
    • http://munnarteabungalows.com/userfiles/file/xepolimidop.pdfIn PDF document text
    • http://tizianaiberti.it/userfiles/files/paboxidupuluxas.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ead05a80fa---wunafuwozutulot.pdfIn PDF document text
    • http://abyss.sk/userfiles/file/fefegitozijuwutaxuwaki.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/0ena8ufjd0lffqqob6a0mjr4pi/pasudurajibolew.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16139b2195657b---18104603206.pdfIn PDF document text
    • https://wisestudentz.com/userfiles/file/34123290198.pdfIn PDF document text
    • http://backkwang.com/userData/board/file/59780254639.pdfIn PDF document text
    • http://alteredcompta.com/buddha/ckfinder/userfiles/files/pepawazukumijutinoleb.pdfIn PDF document text
    • http://laibros.com/ckeditor/userfiles/files/85494952869.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/80812150411.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/96853189228.pdfIn PDF document text
    • http://www.golfusa.be/userfiles/files/nivibuzolilikalako.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_off0000d97c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD97C 17928 bytes
SHA-256: 7d209c8388b1c7bd5b3d46d17734fe1173700db4ffa376b4ce3376cc7e4e49c5
font_01_sfnt_off0001075b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1075B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011f72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F72 10748 bytes
SHA-256: 9fee23bccbce96f143de11ce68de8f73e2a208d7b06fd45a119277ace77451cc

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