Malicious PDF — malware analysis report

Static analysis result for SHA-256 c32f59c1365d9be5…

MALICIOUS

PDF

84.8 KB Created: 2021-08-17 11:10:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c3b3102aa9cad27f2da9389526ed5ad6 SHA-1: 14b105612fecedb3722fac0ada1e2cb273805bb0 SHA-256: c32f59c1365d9be58891141915de3d64e749eadbda5caa436472d1f38df56c01
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads, consistent with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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 https://catamma.ru/uplcv?utm_term=is+there+any+gta+5+money+glitches PDF link annotation
    • http://orgue-chantepie.info/FCKeditor/upload/file/39467089410.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1610676a5d2d52---kuxenikamoneg.pdfIn PDF document text
    • http://newmob.it/userfiles/files/juvepinakovabosalevem.pdfIn PDF document text
    • http://ewtch.com/upload/files/zipirinofikofij.pdfIn PDF document text
    • http://antonioruizabogados.es/userfiles/file/65264110830.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/43028695063.pdfIn PDF document text
    • http://betheaskssd.com/flash/betheaskssd.com/file/18139735345.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/4817e3378a1ff9e54dd4e6709948a215/dotemof.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/2a223fe18fc7369ebe88542e96ee6b85/nulateziw.pdfIn PDF document text
    • http://nuovartea.eu/userfiles/files/wumono.pdfIn PDF document text
    • http://musiclivemarsala.com/userfiles/files/jipemegawepo.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/dafaragudokewok.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609b2312467d8---70297692873.pdfIn PDF document text
    • https://classconnbio.com/img-jacson/files/31574117823.pdfIn PDF document text
    • https://mamo-tato.ro/userfiles/file/6269027110.pdfIn PDF document text
    • http://utpcomp.ru/uploads/files/rinolojunonofalejavu.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/xozoderow.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a8be7d19c21---wewajiwakek.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb9eb76f17---xubepevobixirezotirixi.pdfIn PDF document text
    • http://codemessaging.net/ckfinder/userfiles/files/mupilikinu.pdfIn PDF document text
    • http://piqiso.ru/userfiles/file/33266646071.pdfIn PDF document text
    • https://tonitomov.com/picture/file/rorazodenisajelafubigon.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160aa76ff31d6d---1448302197.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_off0000e674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE674 10876 bytes
SHA-256: 891f36c07eddbb345bbe72339e6f1f87b231771d4d1b3d407585b14ac50c425e
font_01_sfnt_off0000ff7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11790 17268 bytes
SHA-256: f4b87b780bdee0db07386f7e784ca1b3ba7e2ce6fc171e9bfb83bd286c46d8e5