Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe4e0ced624218d2…

MALICIOUS

PDF

81.5 KB Created: 2021-09-11 11:19:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6fe10db8e7888b3e953f9a3e0ee650b5 SHA-1: cef1ca3fe57bfb94214b4f9b0f830c8252b52ad1 SHA-256: fe4e0ced624218d2e231f257d0a868aec6f260ecf2183bf6fba7c623e501ae97
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of multiple PDF link farm heuristics and embedded URLs suggests an attempt to redirect users to compromised or malicious sites. The 'SE_DOWNLOAD_BUTTON' heuristic further supports a lure-based attack pattern, likely phishing or a scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://aaronandanthony.com/userfiles/files/10308318155.pdf In PDF document text
    • https://fundreamz.com/ckfinder/userfiles/files/64327497248.pdfIn PDF document text
    • http://itexpertdog.nwoasis.com/upload/files/vijovegepudetazesatuzu.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/098925246108be20bfa11e6ae95becf1/9091700106.pdfIn PDF document text
    • http://good163.cn/Uploadfiles/files/fuzijorilina.pdfIn PDF document text
    • https://mrpressconsulting.com/UserFiles/file/xewoxujiwazonuzozetojoda.pdfIn PDF document text
    • http://kammerchor-lindau.com/file/51708021126.pdfIn PDF document text
    • http://oa30us.com/userfiles/file/47571533462.pdfIn PDF document text
    • http://familiegravesen.dk/ckfinder/userfiles/files/kubije.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613aa8c6d50f5---73910153415.pdfIn PDF document text
    • http://bernardthevenet.fr/ckfinder/userfiles/files/savegudepopubusomawazu.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/eb923359f5efbcb32fb36902ba207b4d/jivovab.pdfIn PDF document text
    • https://onlinendttraining.com/files/ganezurubifesugobonimu.pdfIn PDF document text
    • https://safe-international.com/userfiles/file/diriz.pdfIn PDF document text
    • http://jamalcar.com/userfiles/file/32097048624.pdfIn PDF document text
    • http://polaryachtmanufactory.com/res/wysiwyg/file/12316514722.pdfIn PDF document text
    • http://pphu-joanna.pl/fckpliki/file/86034487925.pdfIn PDF document text
    • http://biurod9.pl/public/userfiles/file/10537653056.pdfIn PDF document text
    • http://www.videobezopasnost.ru/ckfinder/userfiles/files/68261099113.pdfIn PDF document text
    • http://igigeothermal.jp/userfiles/file/ginanafexakeputulewagolak.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/161349469d8437---59880979.pdfIn PDF document text
    • http://pm-property.pl/userfiles/file/neluzovidejadamisos.pdfIn PDF document text
    • http://vino-charlie.cz/userfiles/file/42683740686.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613366214273a---1496624655.pdfIn PDF document text
    • https://hotelmitrutarija.com/uploaded/files/66495545169.pdfIn PDF document text
    • http://zenithmetals.com/files/23166586313.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+watch+harry+potter+with+friends+onlinePDF 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_off0000d8bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BB 17748 bytes
SHA-256: 3cf77287b79dee458db9b9604205a693cd07311d19a0b6ea66069073120384ec
font_01_sfnt_off00010682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10682 10908 bytes
SHA-256: d6ca94578de5f86eca97a7c4ebb3b25d97e9bb7a619a5e68f2e62021aa6c53ac
font_02_sfnt_off00011fc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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