Malicious PDF — malware analysis report

Static analysis result for SHA-256 0572515cda8856ad…

MALICIOUS

PDF

85.6 KB Created: 2021-07-18 23:54:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 65404b32fb38d0e89257ac31b9366c14 SHA-1: d405a588e12b68d0bc5c5511ec866c76a927d8fa SHA-256: 0572515cda8856ade9f23e2347c7fdd09a6c9e834aa547d14f1690394d8698f4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://albatrossmrn.com/konadnew/userfiles/file/jerimofetexujutelizew.pdf In PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ffe9839416---dirosadadozu.pdfIn PDF document text
    • http://wabasnb.com/files/fckeditor/file/124554985560e77840cd1d5.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/satabom.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089391996b09---kokopuba.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbe6fc3c5a5---fifalobasu.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/78d5ce81f318241851eca861e0dd7a1b/27041694547.pdfIn PDF document text
    • http://shopsuathientu.com/uploads/userfiles/file/42177051565.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160da990c0ac65---zebegin.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ba483093ebb---dezatoditavejifabatumev.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16090e4fda816f---wevew.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a717c78fc39---1118469920.pdfIn PDF document text
    • http://md-servicios.com/userfiles/file/11476745878.pdfIn PDF document text
    • http://sushiloverca.com/uploads/files/68628639226.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609d77464c79f---46938737433.pdfIn PDF document text
    • https://rugsinc.in/UserFiles/files/46060954705.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/bisilukufibawominaxusul.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e833086fbaa---puronum.pdfIn PDF document text
    • https://ubranni.com/uploader/files/79011130820.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1d914f3ac4---paxiwalixorik.pdfIn PDF document text
    • http://9meclinic.com/ckfinder/userfiles/files/tezilonebubufotebu.pdfIn PDF document text
    • http://gsxr.hu/userfiles/file/99439552011.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/lqj6m27i29tdt3kqvfbtn89p74/bufasolisazoku.pdfIn PDF document text
    • https://paradigma.bg/uf/file/47926408320.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bb60e195807---36683450546.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=dracula+untold+2+full+movie+download+mp4PDF 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_off0000ea85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA85 16884 bytes
SHA-256: b1488315ef44e468d5786dba0f83704ba2252d2b829bdc0b5070ef46f16ae4d8
font_01_sfnt_off0001169a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1169A 11064 bytes
SHA-256: c8ff1e78ce7b4d1b748bedc0634ab38d5504d01c7d00a8563708eb7cfaaa980f
font_02_sfnt_off00013080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13080 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1