Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fcc44e4a2e41f70…

MALICIOUS

PDF

70.8 KB Created: 2021-09-08 00:55:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 39ed08ceba651ef4580da81c9e1e90f0 SHA-1: a8e5e4002fd49af925379c2f5050832e36793877 SHA-256: 2fcc44e4a2e41f70af0ef67285afebfe7c5c93972f21cb0cd6ec008021b36414
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a link farm pointing to multiple compromised WordPress sites, likely serving as a distribution point for further malicious content. The presence of numerous unknown URLs suggests a broad phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f27e5955e17---67554209275.pdf In PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16074c01339b99---4466185271.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/ccb44d3a9a770fe1b86727425015e474/95200186252.pdfIn PDF document text
    • http://hncastlecable.com/d/files/velijoxitevebidolepus.pdfIn PDF document text
    • http://ttccid.com/userfiles/files/jeninuveturenerolafe.pdfIn PDF document text
    • http://phantasos.org/userfiles/file/42108332241.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc667e4ee1---gesejedazakitodafi.pdfIn PDF document text
    • http://benthanhsgfarm.com/images/uploads/files/piboluzodixu.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/304141cd0816d75d73e69885156aae69/66875077963.pdfIn PDF document text
    • http://drivescuolaguida.it/userfiles/files/49822192529.pdfIn PDF document text
    • http://livestocktool.com/d/files/lajatakawuzov.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/dc958a69d37ce85f9da77fd4639c55df/kunabudesul.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a32a8c6faf---99749270767.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607974982028e---suzonopomidemuzisenane.pdfIn PDF document text
    • https://dpt-mh.com/uploads/news/files/56573646735.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/161257eea2da00---xipesavakolijugisotu.pdfIn PDF document text
    • http://stoka-saarlouis.de/userfiles/file/vewifuwu.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/6b80d04cf20fd5b4a691948cd6c74aa6/pufuzavetutixaluserakono.pdfIn PDF document text
    • http://cocoal.com/uploads/file/71693972327.pdfIn PDF document text
    • https://mavachhaiphong.com/upload/files/14421417953.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1612693fbb3a70---23579282368.pdfIn PDF document text
    • http://imoroz.by/upload/file/sitinoxudu.pdfIn PDF document text
    • http://opuspointpartner.com/ckfinder/userfiles/files/tozozaja.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d242bc57f5---kirosodebekeputuxa.pdfIn PDF document text
    • http://cn-biyoute.com/d/files/56865704015.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/2bd9d74fe2db0cd20a39de20cb346ea9/10055758705.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=graco+car+seat+manualPDF 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_off0000b916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB916 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD128 14872 bytes
SHA-256: 20c6a64e3d4f93e9409b6ecb536af9110383ac2917370519cdbf9e263c359e05
font_02_sfnt_off0000f5ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5ED 10440 bytes
SHA-256: c2c4d2a606e0c244af4368f8724d29000c33b7e8ead0dbcabbe1c1b5c19ce579