Malicious PDF — malware analysis report

Static analysis result for SHA-256 30c20815b3f3b843…

MALICIOUS

PDF

90.6 KB Created: 2021-08-09 12:49:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 10b6aa0c8a4537535316ca0b1a26b81f SHA-1: 2d5b01d33858c93270cd75180498923ad92763c3 SHA-256: 30c20815b3f3b8437398b8d8fb251b0ff1630242d7fc5539340a43e297a05b53
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external links, many of which point to compromised websites or disposable hosting, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution through these links. No scripts were extracted, but the PDF structure itself is designed to lure users to potentially harmful external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://nhanloc.net/userfiles/file/pemijozawizef.pdf In PDF document text
    • http://montgomery71.com/clients/34132/File/tasafolebiwidusedotajawib.pdfIn PDF document text
    • https://xn--interpeas-r6a.es/upload/files/jorixafukogorumod.pdfIn PDF document text
    • http://mousike.it/img_ins/files/wafixur.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160915b729f970---47725087812.pdfIn PDF document text
    • https://dolnoslaskialarmsmogowy.pl/imgturysta/files/37475010255.pdfIn PDF document text
    • http://tablica-nieruchomosci.pl/uploades/fckeditorfile/daliga.pdfIn PDF document text
    • https://goacetours.com/ckfinder/userfiles/files/26451652477.pdfIn PDF document text
    • http://studiorumeo.it/userfiles/files/bogupaberok.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9f6ea11ec---50268438447.pdfIn PDF document text
    • http://skybuildinfraprojects.com/uploads/27107358363.pdfIn PDF document text
    • https://chetanaus.org/bheru/uploadfiles/file/25635159088.pdfIn PDF document text
    • http://greatnice.club/updatefiles/file/gemiwisexipulawilazigadap.pdfIn PDF document text
    • https://anjingliar2.com/contents//files/22461657095.pdfIn PDF document text
    • http://lorichphoto.com/pictures/file/zekotapapo.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/71061a7913ad363c6784a24cec57d379/69981570645.pdfIn PDF document text
    • https://panegovernance.com/ourprojects/chowki/UserFiles/file/20273267870.pdfIn PDF document text
    • https://cupanghitam.com/contents//files/68851384379.pdfIn PDF document text
    • http://bischofs-scheune.de/userfiles/file/51227612701.pdfIn PDF document text
    • https://sibois.eu/userfiles/file/xeketalafegifidolejutekum.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1314008743---paloru.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160879da3ce027---24885827362.pdfIn PDF document text
    • http://navigator-nsk.ru/userfiles/file/xejegodok.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c4bb1b112---viweni.pdfIn PDF document text
    • http://freeski.hu/freeski/file/lasumojoburibejuf.pdfIn PDF document text
    • http://cameragiaminh.com/upload/files/5706589079.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=t%E1%BA%A3i+ch+play+cho+iphone+mi%E1%BB%85n+ph%C3%ADPDF 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_off0000ed14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED14 10916 bytes
SHA-256: c7343e97aacbd9d96efa39515a004406fc439aaf16faad6aae192288b9d72477
font_01_sfnt_off0001056e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1056E 30664 bytes
SHA-256: e325a1c427383c95b162715bd3414587fb3b4e48f470b100eebe6104d7e9b92c
font_02_sfnt_off000141e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1