Malicious PDF — malware analysis report

Static analysis result for SHA-256 286c4f0891492c15…

MALICIOUS

PDF

104.7 KB Created: 2021-09-04 00:13:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c817e62975505facccd857da6d04cf29 SHA-1: 0ccd13883497abb764bbb604da5e804efda6b426 SHA-256: 286c4f0891492c15bb8cddd53212f049d8f69946f1094b7685d61c80d06a3676
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous URLs pointing to link farms hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript and link farm structure suggest an attempt to obscure the final malicious destination and evade initial detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160c527bcaebe7---jadowufemopanafapixuravu.pdf In PDF document text
    • https://atraba-holding.com/userfiles/file/bupeladizobulebonel.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ec412e39a71---larekapuxuwixaroz.pdfIn PDF document text
    • http://airmon.hu/images/files/dewadakakapelemijitos.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607088aea57a1---68764568588.pdfIn PDF document text
    • http://faulkfamilync.com/clients/c/cc/ccb94402b1eed20a0583117be0c0b506/File/pamasopabenuzurig.pdfIn PDF document text
    • http://palami.by/images/file/wadunujebixupekozefife.pdfIn PDF document text
    • http://miroslaws.com/ckfinder/userfiles/files/mopifawalekuwi.pdfIn PDF document text
    • https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079d4cf01b07---4071071524.pdfIn PDF document text
    • https://brothers-music.com/ckfinder/userfiles/files/66958761246.pdfIn PDF document text
    • http://kolaykanal.com/userfiles/files/rijodanopixun.pdfIn PDF document text
    • http://rencontres-icare.org/userfiles/file/1539593753.pdfIn PDF document text
    • http://studioboscono.it/userfiles/files/xabozubupedelaparesa.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c57b81777e9---xawamupitamomufovijipog.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a0e0d28927---lelamawekijopeduzanu.pdfIn PDF document text
    • http://kstarsmall.net/userfiles/file///buwepekuxanuninan.pdfIn PDF document text
    • https://mediaget.ru/userfiles/files/basobadupemoludokabe.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d6e1ace5c8---79224190561.pdfIn PDF document text
    • https://playerpress.com/ckfinder/userfiles/files/bemowomomimuzitupiduba.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/lupodibofijutiwer.pdfIn PDF document text
    • http://kyanite.tv/userfiles/file/ginusededupekukuz.pdfIn PDF document text
    • http://sun-marche.com/app/webroot/js/ckfinder/userfiles/files/bipesemagigubezukeneza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=cours+d%27astronomie+pour+debutant+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001255c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1255C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013d73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D73 10920 bytes
SHA-256: 456575251507d92010aec5dac16c740acfbc0848fc97a27c493050ac16c1f247
font_02_sfnt_off00015690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15690 24096 bytes
SHA-256: 26924ce347c3c369d179adcc63abc162942e308c2c04fd0db4522696f8536bf4

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