Malicious PDF — malware analysis report

Static analysis result for SHA-256 254052083bd9be69…

MALICIOUS

PDF

85.5 KB Created: 2021-09-01 03:03:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e62d948c1c39500b7f945dd291ea3988 SHA-1: 2891ce69b57dfa51b5cbd7dc3a5f83476dff40d4 SHA-256: 254052083bd9be6901cdf1b4be991c4df73238cfddada6d54ea2e94efe5fd2c3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm hosted on compromised WordPress sites, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607040c16c591---33270023928.pdf In PDF document text
    • https://solidpractise.com/files/userfiles/file/wovelovikaxetaga.pdfIn PDF document text
    • http://isvpro.com/custom/files/devevaxetarotojiwizokef.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/f5c4667ff75a5c8eac3a5ae4026a500e/62490890355.pdfIn PDF document text
    • http://thaihotelsale.com/FileData/ckfinder/files/20210726_B15B81D6CF4D3B9B.pdfIn PDF document text
    • https://tch.lu/files/files/vilololimovavupododiwaruf.pdfIn PDF document text
    • http://mankatomnclassof71.com/clients/e/e0/e0e8961458839910853a12af65841b27/File/36428710726.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4b8e7bf2a---furabotadilubatuwigam.pdfIn PDF document text
    • https://divinenine.net/userfiles/file/rinoravigutugavawuz.pdfIn PDF document text
    • http://tamilannuaire.com/var/www/vhosts/vps296430.ovh.net/tamilannuaire.com/images/file/puxedadudi.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef3aea182e---rupebanosigujizugaf.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8f4a1eb0a---xugiwamatuxu.pdfIn PDF document text
    • http://luxmeterthai.com/ckfinder/userfiles/files/36261516680.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/de433f69fb9c61c0929c06dab98749be/7227655544.pdfIn PDF document text
    • http://stavebnevyrobky.sk/www/upload/files/66729376559.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/6b1c052b3fc7e057d335bfe6d95c76d3/ninotogopina.pdfIn PDF document text
    • https://papiratisk.cz/soubory/47888660881.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/retapexav.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fcb0f66535---81264735743.pdfIn PDF document text
    • http://teenmag.cz/userfiles/file/78396982609.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160835887f3a26---kadavaxu.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160771d12a3cd1---65906717808.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bfde86dc7ee---lukokenijozuxawur.pdfIn PDF document text
    • http://pp-aqua.com/userfiles/files/53711816009.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=ascariasis+in+childrenPDF 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_off0000e92e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE92E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10140 18232 bytes
SHA-256: 6983fe992df1cc7421a190ea725756c873feaa1a15467de60d59ffa4a043cbaa
font_02_sfnt_off00013054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13054 10228 bytes
SHA-256: eea4507821491c3f5292c57bf476a5e74890e671103c24f2f78f48044c3c25b0

Open this report in the interactive analyzer, or submit your own file for analysis.