Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d267db2446ce460…

MALICIOUS

PDF

80.7 KB Created: 2021-09-07 19:09:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 19fbdee2d975a477d7e84ce9a5af90b3 SHA-1: c32b57dfc5f08f9ad20b234c9cf948f1d55977b1 SHA-256: 9d267db2446ce460fac825d407c341887cd22bb5ad410dfbb0d71020ccdb9157
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to various websites, some of which are hosted on compromised WordPress upload directories. This suggests an attempt to lure users to malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

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 http://saovietgroup.com/upload/FCK/file/zadanibob.pdf In PDF document text
    • http://aonetreks.com/uploads/file/64553609241.pdfIn PDF document text
    • http://dachastyle.com/userfiles/file/91850728058.pdfIn PDF document text
    • http://vishwkarmaenterprises.com/webroot/img/userfiles/files/77455636738.pdfIn PDF document text
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607d900e20af0---87994094142.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073691d9d230---verofuzewadoxex.pdfIn PDF document text
    • https://kubermatkaplay.com/ckfinder/userfiles/files/23843375817.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16126283098529---bagojamevaze.pdfIn PDF document text
    • http://grandviewcommunity.com/userimages/vuvel.pdfIn PDF document text
    • http://chono.mn/uploads/userfiles/files/91964671375.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/e6b424f7dba013090a94065d60d553cf/gatuk.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/cpo52e9sqmmr3e2hqbb9del0dc/77385225220.pdfIn PDF document text
    • http://studiotrusso.it/userfiles/files/22569541063.pdfIn PDF document text
    • http://tecnoservizi.com/userfiles/files/1419542809.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/ikkagcbtf0a4k3qggm0msouto1/37558847049.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c19b1605b8d---42667203103.pdfIn PDF document text
    • https://skiclubraonbaccarat.fr/pdf/faxidigogajogafa.pdfIn PDF document text
    • http://gioiacompany.net/images/upload/file/90370262479.pdfIn PDF document text
    • https://aksukartela.com/images_upload/files/wesimosotavobuxetularar.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/25cebe24872c8ecb3bf40be610542820/wudovakudufanobaviki.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/66454569444.pdfIn PDF document text
    • http://xn--90aoj0agf7cq.xn--p1ai/uploads/files/venoz.pdfIn PDF document text
    • http://pillshop.ru/uimg/files/66388459899.pdfIn PDF document text
    • https://mimpishio2bet.net/contents//files/1191080192.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=pandurangashtakam+pdf+in+sanskritPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c0f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD907 16128 bytes
SHA-256: e086d997b6ee3c3fe48f8fdf49e8854b9e9bef9c53b5c2c5f26bba4f2b277426
font_02_sfnt_off0000ee61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE61 18032 bytes
SHA-256: b2246b90360f2938d4cdd5b7d2545c85a1a3825afbd9841ca3edd8acc595e81a
font_03_sfnt_off00011c60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C60 10840 bytes
SHA-256: f9e2a57a8b542ece86a1fcdcd4ee2860f357780f0a4ce5aa4281ce2268130645

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