Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a465c915a6dd098…

MALICIOUS

PDF

75.4 KB Created: 2021-09-09 20:36:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6983e297307806ef34651582c0a7e9bf SHA-1: 34e2889b3bdcd17345a4fadfdb0711bb5929737d SHA-256: 8a465c915a6dd0981478f0074a4edfa587a4975566bc2fd17318492a981c5842
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, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document contains numerous links to disposable domains, suggesting a phishing or malware distribution scheme. The embedded URLs, while many are benign, point to a pattern of using external resources for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://smartickgroup.com/userfiles/68902129682.pdf In PDF document text
    • https://cobrawire.com/userfiles/files/resosodejaxadoko.pdfIn PDF document text
    • https://0286869143.com/editor_images/files/minizad.pdfIn PDF document text
    • http://fairway.cc/images/blog/file/lasuwotavogimugepuji.pdfIn PDF document text
    • http://huabulaw.com/uploadpic/2021-9/file/2021090307555473499.pdfIn PDF document text
    • http://kolaykanal.com/userfiles/files/78082424545.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/161346d6bc5de7---79770917826.pdfIn PDF document text
    • http://ajisushionline.com/uploads/files/561349349.pdfIn PDF document text
    • http://jeanthompson.nl/ckfinder/userfiles/files/62922900416.pdfIn PDF document text
    • https://ntct-dz.com/ckfinder/userfiles/files/jamokopobupulumafiv.pdfIn PDF document text
    • http://firmen-bekleidung.at/userfiles/file/68140267657.pdfIn PDF document text
    • https://quanghuydulich.vn/img_duhoc/files/53740226079.pdfIn PDF document text
    • http://my-hustle.net/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/34936685027.pdfIn PDF document text
    • http://www.schule.havonix.com/ckfinder/userfiles/files/52492772479.pdfIn PDF document text
    • https://dusunceokulu.net/resimler/files/4199513420.pdfIn PDF document text
    • http://kartelabasligi.com/images_upload/files/43702598794.pdfIn PDF document text
    • https://indiansabroad.uk/userfiles/file/fivej.pdfIn PDF document text
    • http://jdjcnc.com/upfolder/e/files/20210906100626.pdfIn PDF document text
    • http://northmarking.com/userfiles/files/jivix.pdfIn PDF document text
    • https://0922.sproname.com/files/userfiles/files/56087290891.pdfIn PDF document text
    • https://absoluteanytime.com/media_file/files/files/bojibemazon.pdfIn PDF document text
    • http://faw-asia.com/image/upload/files/28955197314.pdfIn PDF document text
    • https://kirmatas.com/userfiles/file/27032344589.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=hello+neighbor+hide+and+seek+apk+androidPDF 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_off0000be32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE32 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD644 18172 bytes
SHA-256: 57e705dc529d74631b33e90db1bc81db8f25e0209af4ff1f817193f2f7272f08
font_02_sfnt_off000105b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B3 10796 bytes
SHA-256: 2a9dcb4b4849f56ab7355e12f5961e5c339499a99abfb2d9641eb1526e770964

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