Malicious PDF — malware analysis report

Static analysis result for SHA-256 972bc6d85dd03f6e…

MALICIOUS

PDF

82.2 KB Created: 2021-09-02 03:13:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b0c1591330b0fde6877f3d2c4e2e1675 SHA-1: 46c76c445ccbc1b06f466bd244cbd460bd7c57d2 SHA-256: 972bc6d85dd03f6e1211e98f071c029fa20b5aa12a97b496491e263cad39a095
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document functions as a link farm, with numerous embedded URIs pointing to compromised WordPress sites and other domains, likely serving as lures for phishing or malware downloads. The presence of multiple external links and the use of compromised CMS uploads suggest an attempt to distribute malicious content or redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ketchas.ru/uplcv?utm_term=create+email+link+in+pdf PDF link annotation
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609873de68057---7886662560.pdfIn PDF document text
    • https://amd-export.com/site/upload/file/40640188141.pdfIn PDF document text
    • http://balmybnb.com/t/tutorfirm/uploads/ck/files/lapugupunoseva.pdfIn PDF document text
    • http://handsonmontessoripk.com/userfiles/files/daliliwefuxesezixi.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c23fd67957---dimefujo.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/c70d25e5509b60a98f326a56d43fa251/kokumegineta.pdfIn PDF document text
    • http://anaminfo.com/attachfile/file/76604110959.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/b59d9ef47eb086e2c79c0c2dbff26b9a/tudekiwupanedesobuwami.pdfIn PDF document text
    • http://assytekservizi.com/userfiles/files/xibezamave.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098055272787---temaz.pdfIn PDF document text
    • https://whitesal.com/data/images/file/8220_20210717142415.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/161300b2760881---patijijojufe.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/97473154040.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c0341531613---39550298824.pdfIn PDF document text
    • http://etoprosto.ru/ckfinder/userfiles/files/nadikirelukevidibajizaji.pdfIn PDF document text
    • http://sicompk.com/survey/userfiles/files/fakaj.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/14892563234.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609d3e48171b0---35968058571.pdfIn PDF document text
    • https://pointvirgule.ca/upload/editor/file/2995801262.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5cae1ec788---xiwazubosel.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/3705ab87ce21662b45b31bb6e15d2585/38593182311.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_off0000dab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB3 19056 bytes
SHA-256: 64935b76a884571bcb0c432aa2eddd325379f7e0bd6233ff665465e371ae0cee
font_01_sfnt_off00010bab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000123c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123C2 10492 bytes
SHA-256: 710a5c1cd1f78bca9810e8abf41b1ea4548ff40bdfae04be6833d5da00a10a13

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