Malicious PDF — malware analysis report

Static analysis result for SHA-256 30bcf0b111533262…

MALICIOUS

PDF

69.5 KB Created: 2021-10-03 01:57:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: d49a210ff64578a6dfdaf8292ee71463 SHA-1: ac90014ae1d2ff198810b63fba59c5bcf1e75a75 SHA-256: 30bcf0b1115332628ae7763381ee564093870dffd7ad367bf476ef7ff417237e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links to external websites, many of which are hosted on compromised CMS upload directories or appear to be part of a link farm, suggesting a phishing or malware distribution scheme. No scripts were extracted, but the presence of multiple PDF-specific heuristics related to URI and link farms points towards an attack pattern focused on redirecting users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://sdds.be/userfiles/file/lowerevenijikalogofaro.pdf In PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614d219ddcf76---mavasujipar.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614c9a90e78f1---17822485419.pdfIn PDF document text
    • https://hygradeinsulators.com/images/uploads/file/dekomipibu.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16131ab0445534---70627682619.pdfIn PDF document text
    • https://cubic.is/userfiles/file/61230285857.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/80561044759.pdfIn PDF document text
    • https://orangcar.com/app/webroot/upload/files/zidapolosotunifeludip.pdfIn PDF document text
    • https://mimpisiluman.com/contents/files/fazafarudodibefopigov.pdfIn PDF document text
    • http://tpt.taipei/asset/uploads/files/88045004272.pdfIn PDF document text
    • https://digireg.cz/upload/88437626110.pdfIn PDF document text
    • http://good163.cn/Uploadfiles/files/lanoladizevewuri.pdfIn PDF document text
    • http://longtra.vn/userfiles/file/mojolagaboxexegitego.pdfIn PDF document text
    • http://krr-nfe.com/suratnfe/UserFiles/File/zojig.pdfIn PDF document text
    • http://energyexcess.com/userfiles/file/kefopaxanuzex.pdfIn PDF document text
    • https://atamergranit.com/userfiles/file/lunozuranoxuwaw.pdfIn PDF document text
    • http://edins.net/userData/ebizro_board/file/xisotota.pdfIn PDF document text
    • http://niszczeniewaw.pl/userfiles/file/safodewimijedekejage.pdfIn PDF document text
    • http://ildongwire.com/userfiles/file/gakedizofipewekujepem.pdfIn PDF document text
    • http://beganijewellers.com/ckeditor/ckfinder/userfiles/files/nekutokutizukikotejimik.pdfIn PDF document text
    • http://nanobubblevietnam.com/uploads/userfiles/file/vulezuv.pdfIn PDF document text
    • http://microsolder.hu/userfiles/files/zufikoruruwaz.pdfIn PDF document text
    • https://pastelbuilders.com/userfiles/file/xavizibiregidunobavo.pdfIn PDF document text
    • https://thingstodobahrain.net/ckfinder/userfiles/files/xogadosijagifelif.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161319a05e18ee---luwogepuduw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=phineas+and+ferb+lights+candace+actionPDF 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_off0000b225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB225 14920 bytes
SHA-256: 79625f9664bc8e9c110d90f89257fe4309ef07df6033189732d81e96aae8c4c9
font_01_sfnt_off0000d78b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD78B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000efa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA2 10896 bytes
SHA-256: ce23ddb34e885a6dc600c173dfae053338a2627a5cfc08c0c2b2cdd814cd7fe8

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