Malicious PDF — malware analysis report

Static analysis result for SHA-256 064cc56e21aa8f9f…

MALICIOUS

PDF

80.7 KB Created: 2021-09-20 08:47:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 885183a487865ef11bd6e97df55e880a SHA-1: b5056b135a60f5357e0a6525bf09d18f7ca15bbb SHA-256: 064cc56e21aa8f9f10845aa0eced556c81b72ca92188d94d4b25530b040c06ab
134 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URLs, many of which are part of a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The presence of a 'download' button heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • 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://pistant.ru/uplcv?utm_term=u+dictionary+apk+download PDF link annotation
    • http://d-a-s.cn/userfiles/file/43117772887.pdfIn PDF document text
    • https://music-group-store.com/upload/files/61726135338.pdfIn PDF document text
    • http://timebymtm.com/upload/files/sapanusejuzuzo.pdfIn PDF document text
    • http://boissee.fr/userfiles/file/74233107181.pdfIn PDF document text
    • http://merklink.nl/site/data/ws/files/riwajomadoweroso.pdfIn PDF document text
    • http://osmed.cz/app/webroot/files/files/mifikizazenikagudivow.pdfIn PDF document text
    • http://elosc.com/upFile/file///ITX202109170720147593.pdfIn PDF document text
    • http://orikon.net/Images_upload/files/jewij.pdfIn PDF document text
    • https://llibreriaha.com/img/events/file/88140304925.pdfIn PDF document text
    • https://incoyun.com/calisma2/files/uploads/90916872840.pdfIn PDF document text
    • https://newtech-utm.pl/userfiles/file/nijusajagonobulijav.pdfIn PDF document text
    • http://jucal.es/images/file/wakofozigunoladizet.pdfIn PDF document text
    • http://hongdanhaudio.com/luutru/files/nefugaxugekado.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d399f3671a---zapimufipavasozedenefuf.pdfIn PDF document text
    • https://marikakozmetika.hu/editor_up/bagipixumiketivasot.pdfIn PDF document text
    • http://ebbers-schilderwerken.nl/uploads/files/24546033144.pdfIn PDF document text
    • https://anandalaya.in/resources/file/dopedofisitatakisipe.pdfIn PDF document text
    • https://aukshanya.promosing.com/alpha/ckfinder/userfiles/files/toxavonoxosixakekidosama.pdfIn PDF document text
    • https://tjp2-hotlink-j3t.com/contents/files/92800237841.pdfIn PDF document text
    • https://spandoekland.nl/userfiles/file/bibulebiwudetipujifav.pdfIn PDF document text
    • http://andreuma.madteam.net/ckfinder/userfiles/files/53369211868.pdfIn PDF document text
    • https://khabul.mn/mmpa/userfiles/files/nonupabol.pdfIn PDF document text
    • http://hichipper.com/hichipper/uploadfile/file/2021090120323973499.pdfIn PDF document text
    • https://red-adlay.com/upload/files/11020720750.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_off0000d5f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5F5 18280 bytes
SHA-256: 0630a8df6b417faa09b79e00d99b59340a5d4083fc0e3ac51650ea2afc128ed1
font_01_sfnt_off00010544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10544 10508 bytes
SHA-256: e39967e1db2e0443233809d8bb95d305b143a6124ff91f7a48d299bba6f65050
font_02_sfnt_off00011d55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D55 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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