Malicious PDF — malware analysis report

Static analysis result for SHA-256 ded962a81e30f525…

MALICIOUS

PDF

77.0 KB Created: 2021-07-12 22:42:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6ed19620e897c516c156acc6b28e33c2 SHA-1: 78ac71aa04543820828fc88be0bccbcfc116d330 SHA-256: ded962a81e30f5252d311aaa61086882b2d434cdf02427e6faec55602c0fd1c4
176 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, exhibiting characteristics of a phishing lure. It impersonates a cloud document service, directing users to download further malicious files from compromised WordPress sites and disposable hosting. The presence of numerous external links and the overall structure suggest an attempt to distribute malware or conduct phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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://yourhealthyanswer.com/ckfinder/userfiles/files/11647866111.pdf
    • http://www.pzkexie.com/up_files/file/71727127330.pdf
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/623f7bcdced68efcf42c6a9c9a2b6a41/fimigetufobuvomema.pdf
    • https://lemanssrl.it/file/lijagevosega.pdf
    • http://amirafouad.com/uploaded_files/file/81226063759.pdf
    • http://www.supair-lux.hu/ckfinder/userfiles/files/356690375.pdf
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c844d9d5a---kaxixakuruzazotujibasexu.pdf
    • http://magyaringatlanadatbazis.hu/dev/_user/file/63274958212.pdf
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/f0f9ca95ed7daf1be9e6cc36655f3622/nixutijimugavowuna.pdf
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160862548c2c30---ludenalat.pdf
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/07ccf348c57065e3cedf668dee6e256e/jaruto.pdf
    • http://cctechlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/6309252127.pdf
    • http://augustaelectricalwork.com/editorData/file/fevoxaxoloxogefekevo.pdf
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/d9b3f142fed9f630d812e5c5af91ce02/nabavokarofojadiporutebe.pdf
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/88979030660e6bb0abf5d4.pdf
    • https://ecowaytechnologies.com/ckfinder/userfiles/files/pinepopapuliw.pdf
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/b6b53cf6c3146420be4225a33f33d31a/55404413125.pdf
    • https://astek-telem.fr/userfiles/file/85038265948.pdf
    • http://weddingdiy.cc/uploadfiles/files/20210610_015205_5895.pdf
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/28b06e7f2d8aaf05236ec84f582e7057/tozenepetatupezenilifavot.pdf
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/f18a547f8d723538afb518cd78f5fcc1/40807902538.pdf
    • https://bibliothequedesarts.ch/ckfinder/userfiles/files/6292357060.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=ppt+to+pdf+converter+free+online
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000caab.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCAAB 16792 bytes
font_01_sfnt_off0000e2c2.bin
20d605fbb0ae79904cf8acaa74ced777ec598b895487a9407e36dd64f5bb5407
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C2 10348 bytes
font_02_sfnt_off0000fa31.bin
88e6fb2e7a1bdc720fd39fbdfb50ea16b85c0be7de77feea1643d477a508ab7c
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA31 17604 bytes