Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0744d04224e644f…

MALICIOUS

PDF

75.4 KB Created: 2021-09-13 00:19:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c0ed1c062f88f151f9f143be0eaa144d SHA-1: d942983bc5794ba7ca30c57aa7d7a01aa057abc8 SHA-256: f0744d04224e644f1077814be36a0dbb3eb6ec8b40235b7dc59c234edd81c514
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. Numerous heuristics identified the PDF as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs, while varied, all lead to PDF files hosted on potentially compromised or untrusted domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 http://baozhaopharma.com/upload/files/99501584938.pdf In PDF document text
    • http://buyo-g.net/userfiles/file/tuferunowe.pdfIn PDF document text
    • http://tsrmmessina.it/userfiles/files/taragamivebirarazo.pdfIn PDF document text
    • https://360clothing.in/home/www360cl/public_html/uploads/images/files/97992112073.pdfIn PDF document text
    • http://vectorma.ru/uploads/assets/file/wepexakofapebotilozofik.pdfIn PDF document text
    • https://sambelteri.com/contents/files/laduleteme.pdfIn PDF document text
    • https://pmcp-avac.com/files/upload-ckfinder/files/47635950313.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1612fd31c6f511---dagagoborofidakuwu.pdfIn PDF document text
    • http://another-partner.morefriendship.com/upload/files/89443522013.pdfIn PDF document text
    • https://testpensija.bankai.lv/ckfinder/userfiles/files/pogoparamusubomulemix.pdfIn PDF document text
    • http://www.civilhospitalpalampur.in/img/uploads/files/28979269472.pdfIn PDF document text
    • http://vietsonplastic.com/uploads/userfiles/file/sesujebakemigonoz.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/35648771479.pdfIn PDF document text
    • http://ucinnovation.ru/admin/ckfinder/userfiles/files/65236324420.pdfIn PDF document text
    • http://mrybalko.ru/files/90917793927.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133eaa4a5676---jusozevurumaseb.pdfIn PDF document text
    • https://giyimkent.formenemlak.com/upload/ckfinder/files/34800602336.pdfIn PDF document text
    • http://studiopol.it/userfiles/files/589583547.pdfIn PDF document text
    • https://oddluzanie.net/userfiles/file/17142440350.pdfIn PDF document text
    • http://computergramm.com/userfiles/file/mabiduzaku.pdfIn PDF document text
    • http://centonze-vini.com/userfiles/files/bojoravupedexeladuvo.pdfIn PDF document text
    • http://sportingfoundation.com/uploads/file/82499969993.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dace8c980a---37135011523.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=a+metalloid+is+a+classification+ofPDF 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_off0000c40c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC40C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dc1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1E 17140 bytes
SHA-256: 0df5c5d1bc739e9712257b3c92374753596b8035b1a6fa202e1956e580154905
font_02_sfnt_off00010859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10859 10516 bytes
SHA-256: 7de0768077c88057ee58097b3b1509e35d86243cd75613e1bc6fa42bc3e3a1bb