Malicious PDF — malware analysis report

Static analysis result for SHA-256 49256b1d433d9185…

MALICIOUS

PDF

81.0 KB Created: 2021-09-20 04:57:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a1004c96f9d3de397cfd0699964e83ea SHA-1: cbcf86be5a85d56939fb65d64da7f2131778b18b SHA-256: 49256b1d433d91859c578cb2bed7a673829c4490e97da44caa9c7ac3e2279050
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting or compromised CMS uploads, indicating a link farm designed to redirect users. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest a phishing or malware distribution scheme. The 'SE_DOWNLOAD_BUTTON' heuristic further supports the lure-based attack pattern. Although no scripts were explicitly extracted, the ML classifier and ClamAV detection indicate malicious intent, likely involving exploitation or redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 7

  • 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.
  • 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://garglob.ru/uplcv?utm_term=rush+royale+apk PDF link annotation
    • http://velomagazin.hu/UserFiles/file/55140672212.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/fazadunokerolebosufirufim.pdfIn PDF document text
    • https://biogenetixpharma.com/ci/userfiles/files/96304683325.pdfIn PDF document text
    • http://inter-travel.hu/_user/file/41753303794.pdfIn PDF document text
    • http://ombs.ru/uploads/files/jaboxokitudipegus.pdfIn PDF document text
    • https://capitalsyndic.com/userfiles/file/66411040646.pdfIn PDF document text
    • http://linyuepharm.com/upload/files/wemugikadefovosifeg.pdfIn PDF document text
    • https://cahayaapi1.com/contents/files/50490445469.pdfIn PDF document text
    • https://rubenoferro.com/userfiles/file/gudurodof.pdfIn PDF document text
    • https://signika.pl/Upload/file/xufobatefokajos.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16147c9efe27b9---lelodinafag.pdfIn PDF document text
    • https://shriramsteels.in/public/ckfinder/userfiles/files/77289678307.pdfIn PDF document text
    • https://rajaunited.com/contents/files/jimuzenitovusirugisipi.pdfIn PDF document text
    • http://bodybybodyology.com/ckfinder/userfiles/files/jafuk.pdfIn PDF document text
    • http://hyunshin.net/userfiles/file/womejanomugosowulip.pdfIn PDF document text
    • http://koala-al.com/d/files/jogulituvaj.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/2e469a92f82a0d82496ee1658d43ca5f/33320238723.pdfIn PDF document text
    • http://petgears.com/app/webroot/files/file/97898882338.pdfIn PDF document text
    • http://111-orte.de/testarea/cwsCMSlight/media/files/19438709531.pdfIn PDF document text
    • https://tomas-music.com/contents/files/87705552119.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/94t12rbeoquhhrprsc95063p6h/4860665885.pdfIn PDF document text
    • https://ms02bet.com/contents/files/rakezutebonol.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/sapitofadomamafudumax.pdfIn PDF document text
    • http://bjerkelunden.org/content/files/userfiles/file///97766122090.pdfIn PDF document text
    • https://kaplaitalia.it/userfiles/files/worexopofonetubat.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_off0000da95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA95 10408 bytes
SHA-256: 5b2c2a33d633155b0a2f251a02772351006c67c4c1c368976bbb2235962c2611
font_01_sfnt_off0000f262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF262 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A74 17188 bytes
SHA-256: ec3c3fa8d35aa9e23dd83695e6f34fb01d436c8f93aef96fd9d8a2a4dce1f6d8

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