Malicious PDF — malware analysis report

Static analysis result for SHA-256 7afdc7dab2aeaceb…

MALICIOUS

PDF

95.5 KB Created: 2021-07-07 23:23:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: a9a2cd826a5ceaad786d830d7259a598 SHA-1: 444177b564ab9834925b80643470896dd0493088 SHA-256: 7afdc7dab2aeacebec3bf9a237dce9fdd2306be0fab3c66f2b253f64000f59e2
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised websites and a fake download button, suggesting a phishing or malware distribution scheme. The presence of multiple external URIs and a link farm on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9904

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://garglob.ru/uplcv?utm_term=one+ui+2.0+for+s8+plus PDF link annotation
    • http://alemotta.com/resources/original/file/xewelizopu.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/e30593dc6cf2e3a2fd626b07b0430721/92381688031.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aeae797a116---wekogubasevoxeduritilodow.pdfIn PDF document text
    • http://portalinmobiliario24.com/uploades/fckeditorfile/dotumotadipememit.pdfIn PDF document text
    • https://namdolove.com/FileData/ckfinder/files/20210530_772D3CDDC6F19C0F.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/10220d1f3ec5b120d26534dd543df9b6/41163746047.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/3074aff6459167df2ae585817b0dfaae/83878643965.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/9f82c03cd31eec84563874c313e058c2/49409397089.pdfIn PDF document text
    • http://csc-028.com/userfiles/file/20210610113053_3c5p9u.pdfIn PDF document text
    • https://giverny-bkk.com/upload/files/tufidilutibutaj.pdfIn PDF document text
    • http://tscyw.net/userfiles/file/20210704054936_jow85m.pdfIn PDF document text
    • https://greenvalleykerala.com/ckfinder/userfiles/files/98199650581.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609f74a6d5620---nilikabumetaporilado.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d0c31c382ab---gavojokixuval.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160705132e03bf---xapakabuname.pdfIn PDF document text
    • http://clubsahdianagalati.ro/upload/editor/file/dorekuxogekunop.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/bbc9a47484c31995657e742ac5cf0c95/5880346900.pdfIn PDF document text
    • http://kayamedbursa.com/userfiles/file/14850944647.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/86580213100.pdfIn PDF document text
    • http://commune-bourre.com/userfiles/file/rewovemagupu.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/97925090ee4614430eb470d8407ff403/wizorijudulekulutepikepef.pdfIn PDF document text
    • https://eobliecky.sk/userfiles/file/vefodapex.pdfIn PDF document text
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e93c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE93C 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
font_01_sfnt_off0000fe82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE82 10732 bytes
SHA-256: bd8d07abb5456858cd8123dab2238a99cdfe7b5707af8274169a1b3987dedcad
font_02_sfnt_off00011745.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11745 21400 bytes
SHA-256: 50197db289cea5dbe4c219d81f1000e6d366076e2e46cce6b64181e1e8d051b4
font_03_sfnt_off00014ce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CE2 2064 bytes
SHA-256: 5221cc56e96b657ff7c15f49bf1fbf1b5222e15cd7ffd769ce953162a3e53832
font_04_sfnt_off00015621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15621 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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