Malicious PDF — malware analysis report

Static analysis result for SHA-256 c62c7ec30c319d1d…

MALICIOUS

PDF

69.2 KB Created: 2021-09-26 21:03:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5fb58913afba1ec09f71396014784cb5 SHA-1: d6d59f522be802e6ae3a23a50e81614d609a2df3 SHA-256: c62c7ec30c319d1d004e0c637e431ef56de3e63276281a65f783ecf662eec992
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, with numerous embedded URLs pointing to various domains, some of which are hosted on compromised CMS uploads or disposable hosting. The primary purpose appears to be redirecting users to external content, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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 http://onlytech-tunisie.com/userfiles/file/30826040817.pdf
    • http://falerisztika.hu/tmp/gimekiti.pdf
    • http://www.contectrade.hu/fckfiles/file/8819158009.pdf
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136b9d6caaf7---wuzuwewit.pdf
    • http://intertravel.hu/_user/file/xazifasuwukozaviv.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b6e325c23c---63196373106.pdf
    • https://frenstravel.com/assets/ckfinder/userfiles/files/gilurinuke.pdf
    • http://cosyromania.com/media/file/95751917542.pdf
    • https://afgventuregroup.com/cfiles/file/sagutefosomobew.pdf
    • http://pc580.cn/upload_fck/file/2021-9-8/20210908120217700253.pdf
    • https://sikanderajam.com/Robinson/ckfinder/userfiles/files/86780244304.pdf
    • http://jwconsult2005.com/file_media/file_image/file/kemapilawe.pdf
    • http://gist.adrianlechowicz.pl/userfiles/file/jokumatorelo.pdf
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16140527edd879---57694868154.pdf
    • https://h1t-urlaurora1-turbo.com/contents/files/62173167412.pdf
    • https://aletihad-group.com/userfiles/files/48240710970.pdf
    • https://tpk-m.ru/files/file/zufudesodudowalaleginato.pdf
    • http://xn--80aaa1acmiejxr6d7fg.xn--p1ai/data/files/21309021769.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16148dcf1da010---5069744310.pdf
    • http://abwingsjanaf.com/uploads/files/kurisuba.pdf
    • http://pecsimutargygaleria.hu/files/file/68303846787.pdf
    • http://zulassungsdienst4you.de/bilder/file/dorezamizutinevalebixe.pdf
    • http://www.andreapondika.cz/file/86530381958.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=panic+room+full+movie+hd
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aece.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xAECE 16792 bytes
font_01_sfnt_off0000c6e0.bin
b46a95783304935fc1701a463da830ec97634b6e895db28985f65c03668969ae
pdf-font-stream PDF embedded font (sfnt) at offset 0xC6E0 15328 bytes
font_02_sfnt_off0000edd0.bin
fe981ee3d8e15b616d9bca37e40e0de1a1baa506f8e2da5289f0189c4265a81b
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD0 10640 bytes