Malicious PDF — malware analysis report

Static analysis result for SHA-256 aed974cf4632259c…

MALICIOUS

PDF

86.6 KB Created: 2021-07-14 09:51:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 68915fa610f04d394197e94224326b5a SHA-1: adba7df1259148218351de69f9891773798a1913 SHA-256: aed974cf4632259c7ff7ee3e0c815510735e7d07991331e5daaaa105dcc83c2e
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains a link farm pointing to numerous domains, many of which are hosted on compromised CMS upload directories or appear to be disposable. The primary function seems to be redirecting users to external sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://saopauloairporttransfers.com/ckfinder/userfiles/files/xidatevaxemanaferoti.pdf In PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607de054abb0f---vuxugojemipedezidupogad.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/88cfc53659f21a2555c9b31e370e45f6/galipizidasopipukike.pdfIn PDF document text
    • https://bawaniint.com/ckfinder/userfiles/files/kavebowivatopefutufuti.pdfIn PDF document text
    • http://vienkiemis.lt/app/webroot/uploads/userfiles/files/rinavuzatozo.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608db15398a6a---94061283559.pdfIn PDF document text
    • https://detmers-kontejner.hr/files/xidakojononufi.pdfIn PDF document text
    • http://barrybusiness-crm.com/ressource/devis-photo/files/49222609918.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/ec3bs10gn55fiqpvgg7c6f6u80/tolodaboperav.pdfIn PDF document text
    • http://youngthisyear.com/ckfinder/userfiles/files/dupupiwuwowulu.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/xidujelozadoza.pdfIn PDF document text
    • http://asfalon.com/__files/file/42027653164.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210508193500.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3581919800---limenuwaxe.pdfIn PDF document text
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/zudutivujiv.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160724fb674b0b---teduvita.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d394b479a3---wojelajoz.pdfIn PDF document text
    • http://voxel-avocats.fr/uploads/file/sotatozavekevanozisukox.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160863a987906e---20233131351.pdfIn PDF document text
    • http://broadgatecapital.com/userfiles/file/bumunoda.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/6ce1a4c12dfbff7bf32484e9214f2b29/62568916908.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=astronautics+and+space+engineeringPDF 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_off0000f058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF058 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001086a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1086A 16980 bytes
SHA-256: f4b0878aa371be52522d7994b0e5bb8259234b8c2e3bc7f464100d3b1a7b2869
font_02_sfnt_off0001349d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1349D 10724 bytes
SHA-256: f69ae4d8390373faa383202c6ea7f50b36b71a3905fcfe85c959ef4d0205834d

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