Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6274760ae881a0c…

MALICIOUS

PDF

83.5 KB Created: 2021-08-18 05:48:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 9068e6b753bb64d616f19a75a6c745da SHA-1: 4ff1cddde6560c20981a54c6b5d295f448e74201 SHA-256: c6274760ae881a0c6a6a2592374f3e328169b1744feb4daf6ee7f5b3fcf54261
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as a link farm, with many URLs pointing to compromised or disposable hosting. The ML classifier and ClamAV also identified it as malicious, specifically a phishing trojan. The embedded URLs suggest an attempt to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://dzbnf.com/upload/file///fobaxupifugizupibobu.pdf In PDF document text
    • https://www.edmcenter.xyz/ckfinder/userfiles/files/lifitagelugajexedafe.pdfIn PDF document text
    • http://harringtonassociateslaw.com/Test/JabzMedicalBillingService/userfiles/file/bajidewegelide.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b303e87b708---2043231652.pdfIn PDF document text
    • http://derma-dts.de/files/file/nanujunito.pdfIn PDF document text
    • http://steakclubhn.com/campannas/file/85995305757.pdfIn PDF document text
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/31254862216.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/45tq1ls49h0q36ukf1t19d22g4/xasadekano.pdfIn PDF document text
    • http://aylincinarli.com/fckfiles/file/tetawakewimowo.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160739ccbcb904---2303342407.pdfIn PDF document text
    • https://uniqrelation.com/userfiles/file/labeve.pdfIn PDF document text
    • http://decom.pro/admin/ckfinder/userfiles/files/dutofomoloxitin.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/q7c1ab77b4l1o8lfs1it0k3sol/65771105515.pdfIn PDF document text
    • http://indovinandoilmondo.it/themes/userfiles//files/govawakedabe.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/16086e88355800---xifojipuleranisosaridep.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b80c3788282---87948396102.pdfIn PDF document text
    • http://gojjang.com/uploads/files/subusadefujiludarizolefur.pdfIn PDF document text
    • http://classicalgardenfountains.com/uplds/file/menepifo.pdfIn PDF document text
    • http://mazdooradda.com/userfiles/file/xukozemuno.pdfIn PDF document text
    • http://tzoetemondje.be/uploads/files/nipunapujebawidaf.pdfIn PDF document text
    • http://cdhsalumni.com/clients/28864/File/30457976224.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/10ub455n9dkoarvutfhjeu32t4/budebekudo.pdfIn PDF document text
    • http://fulepmark.hu/nyebu/fulepmark/userfiles/file/76767764392.pdfIn PDF document text
    • http://sushi-belovo.ru/files/38578963979.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/55f5a3220bd570a70b8b81e80acfa8dd/28643548583.pdfIn PDF document text
    • http://hrzservices.com/uploadfiles/file/doziwisibimigas.pdfIn PDF document text
    • http://grupposcorcia.it/userfiles/files/tafolaninirapir.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/92425942839.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=energy+losses+in+pipes+lab+report+pdfPDF 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_off0000e195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE195 16884 bytes
SHA-256: f2cd2b50c36b403689b169db3043bc1a56aa3b71fe4db1638e3b39078398eaf0
font_01_sfnt_off00010d2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D2F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12546 10912 bytes
SHA-256: c4860d0deaa0b0a320ae58b8ec868b5c90a1bc39bb50b56db6d9b2a4307d1858

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