Malicious PDF — malware analysis report

Static analysis result for SHA-256 e98ec8cd7afc3ce1…

MALICIOUS

PDF

75.7 KB Created: 2021-09-07 18:00:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 246ee2931302bb442ceb5dd7a2846cea SHA-1: fb8a9bb7ce074dbf0a8adf50ac00bbe99c764aea SHA-256: e98ec8cd7afc3ce104ee6a613420a95ab00b20713174b3aae5a2ab17bd2593dc
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous websites, many hosted on compromised CMS platforms or disposable domains, indicating a phishing or malware distribution attempt. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classifiers also flagged it as malicious. The primary goal appears to be directing users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://someteme.com/archivos/_20210726113428.pdf In PDF document text
    • https://melz-feu.ru/upload/venepifozavoza.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/a0eecc045f35e15d1512995759dc3450/55563111530.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/mulevikuwezut.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16079cfd3a6554---58292611447.pdfIn PDF document text
    • https://maintogelonline2.com/contents//files/74708946684.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/16072f4209523b---96546773264.pdfIn PDF document text
    • http://ventmetal.ru/userfiles/files/jojakemojopetagakog.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/dudidufemap.pdfIn PDF document text
    • https://lemanssrl.it/file/visosurajonixov.pdfIn PDF document text
    • http://apcmagon.com/userfiles/ralirazakezepisenodinizud.pdfIn PDF document text
    • https://store-connector.com/_upload_bilder/_filemanager/file/83892772446.pdfIn PDF document text
    • http://alacarte-design.de/userfiles/file/gozatuzaderubepeka.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/14dql5hstnpgitlqrtpcpsp4b2/sevanasavupi.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/77799775770.pdfIn PDF document text
    • http://qctc.vn/upload/files/mewukalugeduvukozifi.pdfIn PDF document text
    • https://cissud.eu/uploads/ck_editor/files/92806304771.pdfIn PDF document text
    • http://alexandraharris.com/clients/36054/File/tajezoweduburokifitomo.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/4abc44c5f8ce8a4332733579254f0764/podalozojusatuvafenigane.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/nintnocf3dg35dg2gm2s66n544/32586679214.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/91033482499.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160be78ad991be---14107764450.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fa4dba10104---piwiwuligofevi.pdfIn PDF document text
    • https://www.tahitotfalu.hu/ckfinder/userfiles/files/lazivuxitebexubavo.pdfIn PDF document text
    • http://astro2sphere.com/admin/images/file/sabirefeke.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=criminal+justice+act+2003+pdfPDF 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_off0000c4f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4F9 16152 bytes
SHA-256: 08f941ecb119142b5030898a594d9ba1266d5fef31b912797e49a631eb2e97d2
font_01_sfnt_off0000ee71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE71 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10688 11336 bytes
SHA-256: d88fe973cf2acdba98423f75f70742b6541c8413afa1bd5ab104030d1479ee4b