Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a6191e0f71e2509…

MALICIOUS

PDF

89.3 KB Created: 2021-09-13 11:50:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0c8b98e8293a899db309c4e3e9e3e8e5 SHA-1: ce93fcc8fd74dcbed5af7756853ad0b575f29f99 SHA-256: 9a6191e0f71e2509af30a9adbc7190838b9eb4ec51059cc4c0fe55c699425e9e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file containing embedded JavaScript, which is a common technique for executing malicious code. The PDF also features a large number of external URIs, many of which point to compromised or disposable hosting, indicating a link farm designed to redirect users to malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://fujiya-la.com/uploads/files/laxelidatitowitojenekesas.pdf In PDF document text
    • https://ip-kamera-rendszer.nuttydog.hu/ckfinder/userfiles/files/34889725620.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/d3de92784edf5c486a94f29d2ac5aec9/84000747442.pdfIn PDF document text
    • https://doctmcooper.com/userfiles/files/8670032666.pdfIn PDF document text
    • https://drddvichitra.com/userfiles/file/judaku.pdfIn PDF document text
    • http://baovekhucongnghiep.com/upload/files/90669718167.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/161398491ae855---63059185699.pdfIn PDF document text
    • http://vuonlan.vn/data/upload/files/91565010479.pdfIn PDF document text
    • http://tbeaindia.com/userfiles/file/vawitesuramitu.pdfIn PDF document text
    • http://aunay-sous-auneau.fr/ckfinder/userfiles/files/63203228429.pdfIn PDF document text
    • http://regalmotors-jp.com/js/upload/files/pakupofagalobitikejofusak.pdfIn PDF document text
    • http://saddabro.com/userfiles/file/jijufojuzewadujatoguruz.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139560d5b855---jemuxozukivefebes.pdfIn PDF document text
    • http://ultraljud.nu/bild/files/22847756354.pdfIn PDF document text
    • https://lacgl.org/upload/editor/file/gubipisesimaxobega.pdfIn PDF document text
    • https://pollackmihalyiskola.hu/ckfinder/userfiles/files/64638874738.pdfIn PDF document text
    • http://hosungtour.net/FileData/ckfinder/files/20210905_4584FADBD236718E.pdfIn PDF document text
    • http://mehmetrasimmutlu.com/icerik/file/91826295928.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161393f5f17f1b---tureraxa.pdfIn PDF document text
    • http://studiomalpocher.it/userfiles/files/97379279237.pdfIn PDF document text
    • http://morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e5dce79780---22160625997.pdfIn PDF document text
    • http://yibetter.com/data/files/73040211317.pdfIn PDF document text
    • https://kingwaterpure.com/ckfinder/userfiles/files/73560076214.pdfIn PDF document text
    • https://xn--22ck6bdp5cach0mc23a.com/ckfinder/userfiles/files/73725928915.pdfIn PDF document text
    • http://mirsistem.com/depo/sayfaresim/file/84838286564.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=no+one+saw+a+thing+watch+online+freePDF 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_off0000f63b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF63B 18716 bytes
SHA-256: f404d02c70659f5c52dd541fbe34098859b47c0f43d68adbc7a8f4d6f62a4337
font_01_sfnt_off0001267e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1267E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013e95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E95 10676 bytes
SHA-256: ee9c63f802728da2267dcefece106dc6ad3a0ed18956d4163afcf46f30f3dab3

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