Malicious PDF — malware analysis report

Static analysis result for SHA-256 07d26c0859524775…

MALICIOUS

PDF

84.1 KB Created: 2021-07-16 00:04:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c89e5220552db342d11967090d55f10d SHA-1: c9fae32835251d2663df5c86bd127e06727c6f4c SHA-256: 07d26c0859524775bb1bcb30c674548166d6a18a7e763a59a3452a79c0153238
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload directories, suggesting a phishing or malware distribution scheme. The presence of multiple distinct hosts and the use of UTM parameters in some URLs further support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9783

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://d4scanada.com/clients/8/81/81a8d3ecf29e0a7d9042e8364394d873/File/58838268796.pdf In PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/rqpt0rk3mjeo1qcsmbepr3a1ki/wexeni.pdfIn PDF document text
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608e3450d6e90---58161638813.pdfIn PDF document text
    • https://pjkconstruction.ca/images/file/fikugeboket.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1609a3bf725ddb---14814550928.pdfIn PDF document text
    • http://vds-construct.pl/userfiles/file/dusezilekevuroloso.pdfIn PDF document text
    • https://wodepcb.cn/uploadfiles/files/87497807893.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/powaliduti.pdfIn PDF document text
    • http://alltechsro.cz/files/96056102856.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609ea5872a7e2---bonutogimewa.pdfIn PDF document text
    • http://moonlightmontessori.com/upload/files/xazev.pdfIn PDF document text
    • http://orosweb.hu/ckfinder/userfiles/files/fusotusinodavamuxejimo.pdfIn PDF document text
    • http://musicupclose.com/clients/f/f7/f7c291dfb329fbc33054893077acf627/File/wozapixevefike.pdfIn PDF document text
    • http://aps-mes.com/files/file/wijotusagipimixifasizam.pdfIn PDF document text
    • https://zenmobile.in/jaipriyart/uploads/files/petivetuwurivutixuxilotin.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d222e35f77b---tuzinolisugop.pdfIn PDF document text
    • http://omni-links-europe.com/soxokixaneborarukuloluf.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd658c0b3e---puwutibonareb.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160e2cb3db0730---jijapixo.pdfIn PDF document text
    • http://ultraljud.nu/bild/files/gomesadiresezi.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099e476a95b5---bipinixezufujukave.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16088e980b7a0a---gazamojezedopevadif.pdfIn PDF document text
    • https://lensprovn.com/ckfinder/userfiles/files/xosedasapaleloxasafegedu.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/bbe4d73bc47830ef6b7a99e58a9232e6/jikonivotok.pdfIn PDF document text
    • http://summithighschool1958.com/clients/71652/File/sewetogobi.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2149c61256---52865748382.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=revulsion+meaning+in+tamilPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c66e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC66E 16656 bytes
SHA-256: 0df535198defa42b5766c6216eac83feaaf9b752ba921062c1ea55c6355ead10
font_01_sfnt_off0000f1bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BD 19288 bytes
SHA-256: 212973ad16d725ab10483181a7b1ba3076d45f365f93c3017d0c7c44257a58fa
font_02_sfnt_off000110ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110AE 10560 bytes
SHA-256: f235ffda1503ec1dceca74fd1c49d97fc806eed3f4b889b892760b5e6a039d8c
font_03_sfnt_off000128d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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