Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cd36f077ebe1cb9…

MALICIOUS

PDF

99.3 KB Created: 2021-06-09 20:06:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: cc8fca7db91467ea3c27604a1a544b61 SHA-1: ce92ae69bbcc15d8b9b61e59019728364fc3f84d SHA-256: 2cd36f077ebe1cb98558558c2d86c4a2b34037f7561504925a677c540252891f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a link farm pointing to compromised websites, likely serving as a lure for users to download further malicious content. The presence of external URIs and link farms on compromised CMS uploads suggests a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://pistant.ru/uplcv?utm_term=anne+marie+rockabye+mp3+song+download PDF link annotation
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/b522f65fd0af0727a51e078cb85a5e58/pululu.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/fd54d82181b27a756dac7f53ee2d3e8e/66800142538.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/64300179133.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9826722fbb---73296661903.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c459221072---biluxexofuxakusatopomepen.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b37413a3332---ketuvefolinazopagajo.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/16071cc1f9da13---83084002925.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076d428a5f98---sunizafozoraporajida.pdfIn PDF document text
    • https://iqmuseum.mn/uploads/files/92947637783.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adb80dc0d5b---fefazaxex.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1608c8bd0bd6f4---nadeguxa.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088b7bfd0e4f---lejegatobinemasum.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/8bc00e53e415f7e6d7af19eb0f4c23ad/bugawuza.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/v0r08haiet85cgig874pjci7db/laniven.pdfIn PDF document text
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/2sa5tevlpe724vggs50746nv0p/peliron.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088f00b7d2af---77384173166.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/d6r4o4qeu0ofersl3gngcu68cu/35360594402.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn 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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF300 4612 bytes
SHA-256: 7b3a41d63b8464fdd65d7ce6e23f92e42062d71836fdb3e4c472bb992c916e82
font_01_sfnt_off00010327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10327 5944 bytes
SHA-256: 2589842c39254622022012051017aa4d309bafb32dcbddafaef77d57b95aecea
font_02_sfnt_off00011759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11759 3884 bytes
SHA-256: eaed4e46740c861d823d1af48aaf530bfbd553da6fbcb8491646ae818f10004f
font_03_sfnt_off000126ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126ED 6660 bytes
SHA-256: b4b418a8a8d17cd8463e63f4e9d20aeb2e17d4dfb2bb83e6c2e363902a700cc1
font_04_sfnt_off00013875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13875 16404 bytes
SHA-256: ba7211ae6cc90d8f30e72c5778e9c2aad5bbc5e87a117b9726ee6907f97ca72f
font_05_sfnt_off000169a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169A2 16064 bytes
SHA-256: e456b5595f6e624407e10960d432782794320480929f7deed69280b081edb597

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