Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4b9ee66e731ebc2…

MALICIOUS

PDF

82.4 KB Created: 2021-09-03 09:05:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c4f7091d1c505f98c00ac5b39dee8c6a SHA-1: 19a08d72419112e71a7ec822ccbfc67399179d7d SHA-256: d4b9ee66e731ebc2d1e5e4f06591df8ed65e59f61e999b9275967ec4d7db1d9f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous embedded URLs pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to lure users to malicious content. The presence of these links and the overall detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://oniceh.ru/uplcv?utm_term=photo+to+pdf+free+app PDF link annotation
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/3ad5d65d3320b6f9f21f1e9cd6b47e48/sopigogiwigiweliz.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1610fb72a02943---bosajabajikelik.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/r6666os8r2fgsao03pdm7e1qt0/ranavowarixojaji.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1609149072ad33---27192938033.pdfIn PDF document text
    • http://hvpeds.com/upload/contents/file/82062068038.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/cu21r4ab111nbk5at6jbpv9ua7/6237187588.pdfIn PDF document text
    • http://otevrel.eu/ckfinder/userfiles/files/bepigamekur.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073bc0c4d653---tosulitovoleni.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097c2fa04441---tolidiwedinutowetepigu.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/u5tvh81kb1so58egu6ulhq52f3/28514915316.pdfIn PDF document text
    • http://dui-antidote.net/images/userfiles/file/pevujebewazor.pdfIn PDF document text
    • http://scbczy.cn/up_files/file/20210705_165209.pdfIn PDF document text
    • http://mastera-mix.ru/ckfinder/userfiles/files/66781587839.pdfIn PDF document text
    • http://hoangduy.vn/vn/files/miwazisose.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a091a1c83c---warufabu.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e63f1041d74---lepileseke.pdfIn PDF document text
    • http://sllight.ru/design/img/upload/file/86543849536.pdfIn PDF document text
    • http://nbpcpentecostalchurch.com/clients/65183/File/tarojigidalejixilugab.pdfIn PDF document text
    • http://normel.org/files/upload/file/85890496708.pdfIn PDF document text
    • http://keifo.ru/ckfinder/userfiles/files/naxadijawuginibesov.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b23acf414de---xemodux.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608764d3abeb7---36415114334.pdfIn PDF document text
    • http://ipceurope.eu/assets/file/17638170196.pdfIn PDF document text
    • http://storemisr.com/uploads/files/gituziradujib.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b9f6be08c37---54656142894.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_off0000dfa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA6 10188 bytes
SHA-256: 600abaed7f949468aa66043f67e2bbfd07adeeb6ae4672065124fa41d73250ac
font_01_sfnt_off0000f69b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAD 17364 bytes
SHA-256: 620adffc2acb214c14d83c28484a1ab6aa698587200a5b142b1f42b601010dd1

Open this report in the interactive analyzer, or submit your own file for analysis.