Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2dc0cbc314eaa10…

MALICIOUS

PDF

192.7 KB Created: 2021-07-02 15:26:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 71d8d0d4bd65e9f6fec1a250b9299bb5 SHA-1: 3115bcfbc99b20764cee68d1562543d32d6f1da0 SHA-256: d2dc0cbc314eaa10434ad74e37b5759243c7a2aa025e639c732f18b08019ce5c
176 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs that point to external resources, some of which are hosted on compromised CMS upload directories. The presence of PRC/3D content is also noted, which can sometimes be used for obfuscation or exploitation in PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 7

  • PRC/3D content in PDF medium CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • 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://starlightcelebre.com/clients/4/43/43e9139217482d7666ce300faf566241/File/87335422757.pdf In PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ade0b01c0b3---26994715537.pdfIn PDF document text
    • http://baovevietnam-vnss.com/upload/file/waxefodumobodusesale.pdfIn PDF document text
    • http://ed-web.cz/userfilesfile/tagazopufoxeku.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/ef6240f3b3ef07469a89a9499be526a6/walepivaruv.pdfIn PDF document text
    • http://111-orte.de/testarea/cwsCMSlight/media/files/memumememotifumosup.pdfIn PDF document text
    • http://didaconcept.com/admin/fckeditor/file/14878114805.pdfIn PDF document text
    • http://desagresbrts.com/clients/34568/File/61230865565.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/dd1e8b5f065ae7acea4fa1568b3488fe/xipobevonuwaluwilemenegif.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/okjfg57bbn4s1aint2tbfo2l7f/robapurexalid.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/19071465194.pdfIn PDF document text
    • http://parejalecaros.com/adjunto/upload/fck/files/55847832562.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/gobizut.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/kowidarol.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/34426155906.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd78a327d9---nazepubefol.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/m0f26u07mgvkbnmchiilf79q27/demomojafovukewetidezasan.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca4f5c4fd2---54175731880.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/16070f85ef248c---95420498472.pdfIn PDF document text
    • https://webmenuplus.com/images/file/22469891329.pdfIn PDF document text
    • http://thamdinhgiadaiquang.com/img/files/33595964838.pdfIn PDF document text
    • http://metall-press.ru/files/3210800702.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=emmy+2019+nominationsPDF 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_off00029271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29271 19632 bytes
SHA-256: ea110d3164a70b76347bf4541778deba039fc74f8950bbb91ac0d83fc27c9a6b
font_01_sfnt_off0002c4f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C4F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0002dd10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DD10 10548 bytes
SHA-256: 9e74f2c31e6d8ce00b164588f8427e1a2031594302ede2d55788232dc68ddbe3

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