Malicious PDF — malware analysis report

Static analysis result for SHA-256 02ecc8896afe57e6…

MALICIOUS

PDF

84.2 KB Created: 2021-08-07 17:52:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d41e1ab8e67ac2cdf93c7fba8f98057e SHA-1: f70546479c58a1c0e1e9babfb4d9d1546d985958 SHA-256: 02ecc8896afe57e64880752bcb09a71ef1231e52bb6b74c587433db0a983b3c4
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised websites, which are likely used to host phishing pages or distribute further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically highlights the nature of these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/9a4dd7c983b777f3e653f1f4817c9c50/27635424881.pdf In PDF document text
    • http://edu-family72.ru/content/images/uploads/file/15927928162.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1c50c5f87d071a1ef669f929ba930a70/17120910172.pdfIn PDF document text
    • https://mollis.rs//files/72469443940.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/b65974e1bc7706228b304ffcf7af02d5/61872545004.pdfIn PDF document text
    • http://robertfeinberglaw.com/images/edit_images/file/lakagef.pdfIn PDF document text
    • https://esportenerd.com/app/webroot/ckfinder/userfiles/files/lizexaderatagobonavubag.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/xolezomikemunezilezobu.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/9536c06fbb1c9cd51b6119513606717c/25186056177.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7eb5a0294---kumutijivikirapelog.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/15398184969.pdfIn PDF document text
    • http://diplomat2014.ru/ckfinder/userfiles/files/47161439274.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/c213a42a516afc358842d0d99fb8ce64/22396780067.pdfIn PDF document text
    • http://recit-de-vie.fr/userfiles/file/sonepuleragewiwumajiw.pdfIn PDF document text
    • https://cakenflowersonline.com/userfiles/file/vexetabibeze.pdfIn PDF document text
    • http://ansonseatery.com/uploads/files/lowijawiwilepilil.pdfIn PDF document text
    • http://bmsorganica.com/userfiles/file/rizajitujexofidisusapibib.pdfIn PDF document text
    • https://verlauf-ekb.ru/admin/ckfinder/userfiles/files/79636188651.pdfIn PDF document text
    • https://www.ppmcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/fe4dfqp6l9ih0nsv2oc0jcjvph/32434399964.pdfIn PDF document text
    • http://dansensvenner.dk/imagesfile///modikawanupufo.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/c2825827bd2776d2960647789375e5d1/74999536726.pdfIn PDF document text
    • http://abwingsjanaf.com/uploads/files/pogoget.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=how+do+you+connect+two+ue+booms+togetherPDF 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_off0000e51f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE51F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD36 10948 bytes
SHA-256: 237120f1d99c73c5ce5c0b7d6cc17476b66e74217c7159c50e7d4ee17d4e6947
font_02_sfnt_off00011635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11635 17012 bytes
SHA-256: 5d46807c4969732aae0a0990368351c7a49f72ebba150f6ebc288813a77aa697

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