Malicious PDF — malware analysis report

Static analysis result for SHA-256 29855b2865217cd3…

MALICIOUS

PDF

122.1 KB Created: 2021-06-09 10:50:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: a987a2a7bfc24d5acc6d17937876cc71 SHA-1: 3ec3e5f736465c8e8dd1e977df0b87a4c58a3c8a SHA-256: 29855b2865217cd331b9fb356f7dfd25680503bc3187372f27bc087af0a58df8
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. It functions as a link farm, containing numerous URLs that redirect to potentially compromised websites or disposable hosting. The presence of these links suggests the document is designed to lure users to external malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://pistant.ru/uplcv?utm_term=my+hero+academia+season+4+episode+6+dub PDF link annotation
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608052830e580---67639517498.pdfIn PDF document text
    • http://panda-es.tokyo/yamituki-n/uploads/files/59315253085.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/bizokedib.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7c8bcce55---rivafeleribetirap.pdfIn PDF document text
    • http://www.klimavill.com//data/editorfile/74753897156.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d57a76671d25185f1d98e21523b7ec99/noboxugegutibalejosefana.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/14863226443.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/ektv4sk6p260eprh53qfggva3b/24352858571.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/7cbb00a3d22521fe7cbe03f64db0dcb7/bekilusotekogom.pdfIn PDF document text
    • https://summit-christian-academy.org/scauserfiles/files/38738558811.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/zewuwolifitoges.pdfIn PDF document text
    • http://meteosputnik.ru/userfiles/file/pobadowipesufegu.pdfIn PDF document text
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607365b608a7c---73411417989.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16081af88bea5b---50271306088.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/90377393500.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a34ed1329e6---buminonawawuzitewiwax.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/f1ngsd6ipq39rhhrqj7p0nou41/vezonase.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/60qmp7403d9rn7toap6v9059c4/sasenadiperimiwowa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000122fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122FC 33152 bytes
SHA-256: f10d054a7db1419f17511d43291c5e3a42f2de5c86a72a7bd4cbc41d8a04fc6d
font_01_sfnt_off0001890f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1890F 5772 bytes
SHA-256: 0cf4412ff94c3837a578247e86f850ab293877e09e216f44f7f674b06bba7a79
font_02_sfnt_off00019c97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19C97 11960 bytes
SHA-256: 1e2d3df2dec4ca367fdb3c3427a35c9f0a4840730de6b1709da266efe1456161
font_03_sfnt_off0001c443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C443 16648 bytes
SHA-256: fb08e7d71356873e52a4eda9c82f9cf6c2b6fa6bddebde209e33bdcbb7280c90

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