Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1d6aee8da65382c…

MALICIOUS

PDF

86.0 KB Created: 2021-09-14 04:16:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c280fec6b12d6aeb07afb34d18462082 SHA-1: 947a369e85c4a1d0270a6050354ed11c7a3f43ce SHA-256: a1d6aee8da65382c4d6bbc5d227c1088ec8769484c273b8afe6d4d44c9a288bf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed for SEO manipulation or to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://rajaunited.com/contents/files/masusufibube.pdf In PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1613f80dca3e1d---feruwewaxozibabiwalon.pdfIn PDF document text
    • http://lifebeachvilla.com/uploads/image/files/64119535115.pdfIn PDF document text
    • http://dungcumaymoc.com/Images_upload/files/ralojukonuroj.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132c83b00866---zujuf.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/044bb011693bb1247f35d2fdb670ee9a/84157587436.pdfIn PDF document text
    • http://vaonhaphatphap.com/images/uploads/files/21306770490.pdfIn PDF document text
    • https://whitesal.com/data/images/file/1403_20210910193246.pdfIn PDF document text
    • https://middletonchambers.com/ckfinder/userfiles/files/15542807302.pdfIn PDF document text
    • http://mylodge-naoshima.com/2809798699.pdfIn PDF document text
    • https://proektasis.gr/admin/spaw2/uploads/files/palameguxif.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/s3rt8ft1raubj5mu78sgitqja4/rokelerarikan.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/1g7v4443ehudptaam4g47pn001/dativininiwerabejawu.pdfIn PDF document text
    • http://96stone.ru/userfiles/file/84205495438.pdfIn PDF document text
    • https://olboihorgaszto.hu/editor_up2/14596769423.pdfIn PDF document text
    • http://rigassprotes.lv/uploadz/file/95074849348.pdfIn PDF document text
    • https://tjp2-hotlink-j3t.com/contents/files/sebefamugivedu.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/621e3a0673200295a1bf8d415e9fb894/35224662364.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/7p23uhn83mcictopcodkgqd05u/rurojigorona.pdfIn PDF document text
    • https://wedding-photos.cz/userfiles/file/buwukijijivanonoveku.pdfIn PDF document text
    • http://slesnick.net/userfiles/files/zawala.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/94573000403.pdfIn PDF document text
    • http://himalayakebab.irafbrothers.com/shipinc/userfiles/files/dawadolovavalulo.pdfIn PDF document text
    • https://lionkingbali.com/uploads/file/34561312616.pdfIn PDF document text
    • https://kaptenhoki.org/contents/files/68416379762.pdfIn PDF document text
    • http://airmon.hu/images/files/8959727899.pdfIn PDF document text
    • http://baocaosudanang24h.com/uploads/image/files/31568641338.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=best+android+games+compatible+with+controllerPDF 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_off0000ea47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA47 17848 bytes
SHA-256: d0b995f867fc030697b04384826430c20ae1a925179dfbad5c408c028d82acec
font_01_sfnt_off000117fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13013 11240 bytes
SHA-256: 6d053299517794957740a24343c6cddded2490bed8f2ccb13924833b4904a37b

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