Malicious PDF — malware analysis report

Static analysis result for SHA-256 acdd5dd2396ff48c…

MALICIOUS

PDF

77.5 KB Created: 2021-09-17 18:05:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 447fad4ac7b46d2e3fa1b861cf21e50b SHA-1: eba57632e02313bdbae0ffe0ea23c2bc613ac2ac SHA-256: acdd5dd2396ff48cf6be6e675483ee2c26babf253722f912a044994e94054632
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The 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, with many URLs pointing to compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://oniceh.ru/uplcv?utm_term=tamil+full+movie+hd+downloading PDF link annotation
    • http://saint-party.com/media/file/nimopijoxapizojaxepaj.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613248d7999ec---suzesidobibinin.pdfIn PDF document text
    • http://onlytech-tunisie.com/userfiles/file/bebikix.pdfIn PDF document text
    • http://lynxitservices.com/ckfinder/userfiles/files/worozibukiwosalepe.pdfIn PDF document text
    • https://europartner2.pl/uploads/bajimiwijafad.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/161447c5772bcd---18349969308.pdfIn PDF document text
    • https://magicdiscoradio.hu/userfiles/file/56449088480.pdfIn PDF document text
    • http://www.css-jp.com/upfile/files/2021/09/12/4422306108.pdfIn PDF document text
    • http://mecateengenharia.com.br/ckfinder/userfiles/files/surubadobabo.pdfIn PDF document text
    • http://pekbdt.com/filespath/files/20210904160409.pdfIn PDF document text
    • http://kaies.net/upfiles/2109072317146850013egb02.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/32184431535.pdfIn PDF document text
    • https://luatsuavina.com/userfiles/file/46114945809.pdfIn PDF document text
    • http://amblesidewindermere.ca/fckuploads/images/file/42746995574.pdfIn PDF document text
    • http://drairtools.com/ckfinder/userfiles/files/56110820131.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/77l99fkocju572io2kt40oh84u/36226540905.pdfIn PDF document text
    • https://grootformaatspandoeken.nl/userfiles/file/48960459509.pdfIn PDF document text
    • http://tecs4.com/intranet/ckfinder/userfiles/files/87908334993.pdfIn PDF document text
    • https://martan.es/cenavarra_userfiles/files/niguwufaxasagaju.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/71151423017.pdfIn PDF document text
    • http://magooferta.pl/uploads/fck/file/65803405449.pdfIn PDF document text
    • http://protetyka-lublin.com/images/wyswig_images/file/poruxokogekub.pdfIn PDF document text
    • https://www.mppoa.cloudlinesystems.com/assets/ckfinder/userfiles/files/44595880789.pdfIn PDF document text
    • https://client-sms.com/ckfinder/userfiles/files/minasagar.pdfIn PDF document text
    • http://biplano.eu/userfiles/files/fepigikemevinakotij.pdfIn PDF document text
    • https://arabadvertise.com/userfiles/files/moxorerisa.pdfIn PDF document text
    • 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_off0000cb68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB68 17456 bytes
SHA-256: 06ac9c59bcc1fcde93bb16ece0c8945d81e5e0e64a0ef12eae28363287db1d77
font_01_sfnt_off0000f818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF818 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001102f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1102F 10648 bytes
SHA-256: a25274c4e2de850bbf8d9c67d2c1093bc0993dfe9b862acbb1bfb421dcb80736

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