Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f68648832190e54…

MALICIOUS

PDF

88.9 KB Created: 2021-06-29 17:02:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 19901961a153a19b8db87d54fd2050a3 SHA-1: 2ed8b2c0e6fb5532ee25dd529271720c65c309be SHA-256: 1f68648832190e548e76423a10835abdcca0ed7ee8522620a1bdf60987fbffc6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many pointing to compromised websites or disposable hosting, indicative of a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm nature suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 http://banghetretruc.com/media/ftp/file/31432549503.pdf In PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/5cc164d64869b7aa394f30b383dcb1b5/fivemegedozibumivaziripik.pdfIn PDF document text
    • http://alliusie.com/userfiles/file/sevila.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfd614fc1d---lugugelamekupolu.pdfIn PDF document text
    • https://hashtag.school/userfiles/file/xulurepesubamuz.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160878d5b5e374---7966992823.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/3d7e54a29327e2faf0b58d753c927055/53002220273.pdfIn PDF document text
    • https://namratalakhotia.com/userfiles/files/zixebetaxunow.pdfIn PDF document text
    • http://nutronicltd.com/userfiles/file/wusefirubarukebejemij.pdfIn PDF document text
    • http://flomojapan.com/upload/files/kigibulozoteforiroziroze.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/t2k1bg4pds8i13s7s6gckg4s47/90062311763.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/e7be0075401070fc5f8c6e3f17e3727e/vakiti.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609babd18277e---79459169822.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/5d1b98fe2e7249d1e555e69dac3cf379/radalokesivadawilavuvonu.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/39955320587.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a3cddb73c3---33129445726.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/jogawotabufuzobigorojer.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/k1qr7lfd9tc6pd31uutj50k3bn/jimukolifawimumazegegi.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/k95n73s8ffckccgbpfcisq3185/doruzonifumipesi.pdfIn PDF document text
    • https://trellisdundee.com/wp-content/plugins/super-forms/uploads/php/files/e75ca46fd80d0e7af312dfecb7fe76e2/vuruluketutazelarajow.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/df04d228e24415f40e0caaa98ea7c4fb/82734406327.pdfIn PDF document text
    • https://foodphotoshop.com/userfiles/files/31104898910.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/es54n70qa1t65e2oahb13lf3b5/fagepilejasusivoguk.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/10a162f16cb500181ec072c0c2767bd7/zuvusuxubuvopudo.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16085f9da871dc---40707472378.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160755bba6e94f---gapupisigu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=how+to+make+royal+blue+paintPDF 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_off0000f917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF917 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001112e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1112E 10768 bytes
SHA-256: fb094af2bf11d69ccbaaedabe00804613fe4bf7b6cbd856ae34506b3bd48ab4c
font_02_sfnt_off000129ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129AD 17432 bytes
SHA-256: 1101b19414c9fa189dbcb4744840d17534a73698e8bf847c16e80e90facc11e0

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