Malicious PDF — malware analysis report

Static analysis result for SHA-256 47055ce1997dd13e…

MALICIOUS

PDF

82.3 KB Created: 2021-09-10 20:06:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ab179f9ec5b833b1631db7ca43b2e693 SHA-1: 09563a20ac518af257265736a48c33878a183b64 SHA-256: 47055ce1997dd13efd17fb995f74e24f7d0512012900450ace72061186a4b97e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to a link farm, suggesting a tactic to manipulate search engine results or distribute additional malicious files. The presence of multiple disposable hosts and UTM parameters in some URLs further supports a malicious intent related to link farming and potential phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://www.shjkyq.com/up_files/FCK/file/96996423711.pdf In PDF document text
    • http://luxmeterthai.com/ckfinder/userfiles/files/rinirerujepajina.pdfIn PDF document text
    • http://studiotecnicomancini.eu/userfiles/files/68033842237.pdfIn PDF document text
    • http://373113.linker.tw/files/kudux.pdfIn PDF document text
    • http://cassotech.nl/site/data/ws/files/90202232118.pdfIn PDF document text
    • http://elma-itc.ru/!upload/files/bafasubizuwane.pdfIn PDF document text
    • http://residencelesaline.it/userfiles/files/63778673307.pdfIn PDF document text
    • https://canionglobal.com/FCKeditor/file/59697517416.pdfIn PDF document text
    • http://poney-club-romilly-aigre28.fr/userfiles/file/xikaxevoma.pdfIn PDF document text
    • http://55pluscommunityspecialist.com/userfiles/files/2205680620.pdfIn PDF document text
    • https://sakesushimn.com/userfiles/files/madulofeligonosu.pdfIn PDF document text
    • https://farmacieitaliane.com/documenti/file/83871192178.pdfIn PDF document text
    • http://kepco-group.com/uploaded_files/userfiles/files/81176380147.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/161320ea98a51c---83258880605.pdfIn PDF document text
    • http://www.teeintact.com/admin/fckeditor/editor/filemanager/connectors/php/img/file/xonenupo.pdfIn PDF document text
    • https://highendteen.com/userfiles/files/gewanabimapasisozu.pdfIn PDF document text
    • http://ecovn.vn/uploads/news_file/55181494143.pdfIn PDF document text
    • https://lotte-ppta.com/beta/assets/file/betomokamavesa.pdfIn PDF document text
    • http://lor-rostov.su/userfiles/files/fuvodawakon.pdfIn PDF document text
    • http://www.injamal.es/nueva/ckfinder/userfiles/files/44597786546.pdfIn PDF document text
    • https://baust.edu.bd/app/webroot/ckfinder/userfiles/files/nujimanulivimigifaset.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=imo+video+call+software+free+download+for+pcPDF 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_off0000dde7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE7 17308 bytes
SHA-256: c2959627baba9105db3899e2e8d4e575d292c06d43389642baba29589194b240
font_01_sfnt_off00010a72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A72 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12289 10884 bytes
SHA-256: 218afb25fb99f072aee3cfef4e350dee27bdd28600b24b16dae1d8014a04341a

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