Malicious PDF — malware analysis report

Static analysis result for SHA-256 fee1b0fd01ad539b…

MALICIOUS

PDF

85.6 KB Created: 2021-09-20 02:01:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6e41051ea5e089e25ac8575ca4ca76c1 SHA-1: 20fad25b015417a8d4070c1aad1b8f2b7d2a6ed0 SHA-256: fee1b0fd01ad539bea3f51311fc0a5fb0151608d93e0dbb2530349b94b413bbe
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pistant.ru/uplcv?utm_term=youtube+downloader+mp3+mp4+converter PDF link annotation
    • https://anitacalderon.com/ckfinder/userfiles/files/8405594848.pdfIn PDF document text
    • http://blankheich.de/images/uploads/file/fazigalakimewuwogezokakuv.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/161364bd3eda0b---12004864626.pdfIn PDF document text
    • https://ptkas.com/kingkong/userfiles/files/kuvukojedozuvokela.pdfIn PDF document text
    • http://stmrcstvm.com/userfiles/file/vurepuwafo.pdfIn PDF document text
    • https://firesystem.ro/imagini_ws/33228662370.pdfIn PDF document text
    • http://olddieselparts.com/ckfinder/userfiles/files/fativizofu.pdfIn PDF document text
    • https://angelsstaff.com/uploads/file/kexeserupa.pdfIn PDF document text
    • http://sluchatka-shop.cz/files/upload/files/23852400225.pdfIn PDF document text
    • https://marljivo.hr/UserFiles/files/balazogogigekuzuvamep.pdfIn PDF document text
    • http://salamino.pl/userfiles/file/69433790385.pdfIn PDF document text
    • http://sashtraayurveda.com/ckfinder/userfiles/files/93283325851.pdfIn PDF document text
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/vufopologux.pdfIn PDF document text
    • http://bangladeshceramicsociety.com/uploads/editor/files/32345866643.pdfIn PDF document text
    • http://greenld.com/userfiles/91799528492.pdfIn PDF document text
    • https://www.campacinter.com/image/upload/File/xarufazazuwilat.pdfIn PDF document text
    • https://seedcambodia.org/htdocs/cljr/data/files/13328794125.pdfIn PDF document text
    • http://yushendesign.com/images_fck/file/1631837062.pdfIn PDF document text
    • http://adice-area.com/pictures/files/90568768981.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/161324930a868a---36091415824.pdfIn PDF document text
    • https://at2-turbo-j3t.com/contents/files/12796475891.pdfIn PDF document text
    • http://ipublicity.cz/data/file/lovifatafogowasali.pdfIn PDF document text
    • https://sausalito.com/wysiwygfiles/file/44417643181.pdfIn PDF document text
    • http://greentreeprep.com/cote_dor_import/admin/ckfinder/userfiles/files/45664614529.pdfIn PDF document text
    • http://scouttautomotive.com/editor_uploads/system/files/gawipeguvusanagifuz.pdfIn PDF document text
    • http://thewhitmerlawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/99638089673.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e77a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77A 11040 bytes
SHA-256: be7f7bb3f8f218c2186147c605854bc3e4881e4f6755ec23cf00c78cae67e922
font_01_sfnt_off00010110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10110 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11922 18220 bytes
SHA-256: 48a329e4bca524f43b92760ff188ee69185fe021b42a1912a738f8beb949428c