Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b89f96a87191919…

MALICIOUS

PDF

75.1 KB Created: 2021-09-18 15:22:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: 29dbe833a96000f0c668f9446d478c6f SHA-1: bca05679003dbd3fb7c1c07fc247fb403c41684f SHA-256: 9b89f96a8719191993fa91f28f9797aecf65a312950a88f3a80f8bcbdb900368
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external URIs and is identified as a link farm, suggesting it's designed to redirect users to malicious sites. The heuristic 'SE_CALLBACK_LURE' further suggests a phishing context, likely involving fake billing or subscription scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://irlanc.ru/uplcv?utm_term=pubg+hack+for+ios+14 PDF link annotation
    • http://humanitool.ru/userfiles/file/xuvuseze.pdfIn PDF document text
    • https://www.shipgo17.com/plugin/ckeditor/ckfinder/userfiles/files/52362263016.pdfIn PDF document text
    • https://aparcaderoshaddaichile.cl/uploads/images/files/lejufusulelibeduran.pdfIn PDF document text
    • https://dehaventransportation.com/home/de/public_html/ckfinder/userfiles/files/kisujinogugokik.pdfIn PDF document text
    • http://adasbruiloften.nl/userfiles/file/17602326352.pdfIn PDF document text
    • http://investin-khj.ir/ckfinder/userfiles/files/82351605809.pdfIn PDF document text
    • http://louisamerino.com/userfiles/file/nedewexogunuxuvusitesas.pdfIn PDF document text
    • http://box8websites.com/ckfinder/userfiles/files/35182504713.pdfIn PDF document text
    • http://vietsinphar.com/uploads/files/paraguz.pdfIn PDF document text
    • http://mariondhuique-mayer.com/data/file/40291848701.pdfIn PDF document text
    • http://de.ruben.pl/ckfinder/userfiles/files/togojanoviwagoroxikapizu.pdfIn PDF document text
    • http://hidrometa.com/images_upload/files/40898941939.pdfIn PDF document text
    • http://sun-green.be/ckfinder/userfiles/files/mabukanitivufa.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/9384312653d1aa0b83c074ad9f038dcc/musidomup.pdfIn PDF document text
    • https://bankubezpieczen.pl/userfiles/file/54898883578.pdfIn PDF document text
    • http://billagelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vejedopo.pdfIn PDF document text
    • http://keralatravelpath.com/uploads/file/54093123824.pdfIn PDF document text
    • https://ssmahavidyalaya.org/lion/uploadedfiles/fck/files/file/xukerugedenafizibomug.pdfIn PDF document text
    • http://namadagaskare.ru/ckfinder/userfiles/files/83284019605.pdfIn PDF document text
    • http://ks4073.com/file_media/file_image/file/dumasitexulizenefabij.pdfIn PDF document text
    • http://saiprogetti.net/userfiles/files/87270531463.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_off0000c111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC111 10696 bytes
SHA-256: ce6e07eccae2e93d0dc8ba82ccd58965f6831ce9530ff07733d225ba731fc57e
font_01_sfnt_off0000d9d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D1 17440 bytes
SHA-256: dd50e271285807e57f48b90bc4698ce4d0e6a41eb04ffdcb486e14a536fef1f7
font_02_sfnt_off00010760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10760 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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