Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d3cca9e792b99be…

MALICIOUS

PDF

182.3 KB Created: 2021-09-07 06:18:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: af7c98e077de76bbf0143f76032e488a SHA-1: ddd1ef379e72a49585b030da0a3b137e8a11e740 SHA-256: 3d3cca9e792b99bec4ba051381757c3d8c8b8774fa7c8347021d841200d68349
216 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The critical heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document's intent to solicit sensitive recovery information from the user. Multiple URLs were extracted, some pointing to compromised CMS uploads and disposable hosting, suggesting a link farm used for phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9772

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://n2nlah.org/UserFiles/file/5621115494.pdf In PDF document text
    • http://homespakistan.net/magzine/uploadfiles/file/80437646928.pdfIn PDF document text
    • http://inbeeldt.nl/userfiles/file/79760357804.pdfIn PDF document text
    • https://leise.ru/admin/ckfinder/userfiles/files/64184954705.pdfIn PDF document text
    • http://natproperty.com/userfiles/files/nosizigekevabonopirowiwe.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/6b5e24afadbf73d252306702f4b794e2/dakomogajokavodojidepigo.pdfIn PDF document text
    • https://reitinguok.lt/userfiles/file/kiziniresaligojuwepelowe.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/wowegibukujumofigaxofeg.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/19870638111.pdfIn PDF document text
    • http://cesurmakina.com/userfiles/file/wamup.pdfIn PDF document text
    • http://tythb.cn/uploadfile/files/27551730050.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/3e728b49nj47hk35kunhksu944/jowedezujipoje.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/16108bd577551c---xozisojuvipuwuzonuju.pdfIn PDF document text
    • https://takipcisec.com/calisma2/files/uploads/14446208313.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/21552424736.pdfIn PDF document text
    • http://illinoislivestock.org/userfiles/file/78234514972.pdfIn PDF document text
    • http://kemnhapkhau.com/upload/files/xinukafezimefosubekigifar.pdfIn PDF document text
    • https://educhina.mn/editor/files/54950785201.pdfIn PDF document text
    • http://feynburg-uhren.de/uploads/14225439217.pdfIn PDF document text
    • http://writtenmail.com/upload_images/file/19275695729.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/a33978d8db9d2246d89101f013b99fae/powule.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608b7dea896b0---95384964467.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b71410eb8---80868339202.pdfIn PDF document text
    • http://hoteldanang.vn/uploads/images/files/gaborawepotivun.pdfIn PDF document text
    • http://taxicityplus.ru/userfiles/file/jerenugukoribolotitenibe.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/c6682541a7107a1b145dfefcc7c15ed4/86586441878.pdfIn PDF document text
    • https://www.channeloflove.com/ckfinder/userfiles/files/59083711837.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=wd+cloud+ex2+ultra+manualPDF 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_off00026661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26661 20112 bytes
SHA-256: ea6407a77c88fbd9726ed1659cb56aeaf91c0743289aa6bac3921c52f059b10c
font_01_sfnt_off00029a00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29A00 10588 bytes
SHA-256: d084563b9c313393a643c7b953b44daf203efbc4a4106dcb67b55a03857f3c80
font_02_sfnt_off0002b24a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B24A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1