Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2fd3c1cef229187…

MALICIOUS

PDF

135.6 KB Created: 2021-06-29 02:48:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 6d72c91d4c518e137f3953e5ac41d03f SHA-1: bc43b7360f626e9a6249760212d53910b5b88977 SHA-256: d2fd3c1cef2291873b2e63089a1453fa7a395e37bd322bbc41dd75a45a5f20fc
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm containing numerous URLs pointing to compromised WordPress sites and disposable domains, suggesting a phishing or malware distribution scheme. The PDF's structure and the nature of the embedded links strongly indicate it's designed to lure users to malicious external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://harrisitalia.it/uploads/file/wepatizitisadozawutitopis.pdf In PDF document text
    • http://zkojicin.cz/userfiles/file/17485363337.pdfIn PDF document text
    • https://bdaudit.ro/userfiles/file/vusixadavadiziw.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160854879a1704---27154454714.pdfIn PDF document text
    • http://ristorantebiscione.com/userfiles/files/sitetiwemuw.pdfIn PDF document text
    • http://alexandraharris.com/clients/36054/File/77754692606.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b99ec78ad5a---jopamisesirerowukajoruk.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/3e3015b6f27d7a9210f0818d5ea435c8/79941570934.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8e8c698760---40188819427.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/9fcf552624687471bc0295ad4957204c/zufajifodizaxuka.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ce2tuhrf1bglp3pj1i528sdo00/52310554086.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/l2fhip2dhbmnd52t6ljkfpqosk/nokajubelob.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba19f3d17d9---rufigefusogarogagipifike.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160827f284bcb6---42534978218.pdfIn PDF document text
    • http://dichvugiayphep.net/hinhanh_fckeditor/file/wedaluregabonis.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/19468333629.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160820a322dd47---41623417074.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bff00267e9---3510567483.pdfIn PDF document text
    • http://www.derbysignandgraphics.com/uploads/file/44313820310.pdfIn PDF document text
    • http://hawks79.com/clients/85064/File/zijozidujofu.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070b51632019---pisefedojivinet.pdfIn PDF document text
    • http://gpmpoolandspa.com/ckfinder/userfiles/files/sepopi.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160911cbb064a3---ruwarafafikabelorebab.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/99306848786.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=improvised+but+sufficient+for+the+purposePDF 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_off0001ad90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AD90 19256 bytes
SHA-256: 31ba41ac218a84ede7ff3cdea8acc095871955a3df248a5a0828d81f83fba7ba
font_01_sfnt_off0001df67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DF67 10932 bytes
SHA-256: 95f39608968ed64956e045a0900fae026a9319c269e79e88ea4d4fcfb073bb7c
font_02_sfnt_off0001f852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F852 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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