Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2f77fa850e00081…

MALICIOUS

PDF

77.3 KB Created: 2021-09-03 04:11:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 421f633b200deb984c532b51b2dad47c SHA-1: 11e55ba606caf62a394cab3f025c8c1dee9d6d95 SHA-256: d2f77fa850e00081889e7d06104a5e3a2b8f109f62060549f6c645239adf09f5
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 by an ML classifier as malicious. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of external URIs and link farm heuristics indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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 http://anandtouristcorporation.com/uploads/xatixuwivuzenig.pdf In PDF document text
    • http://vdadanang.vn/app/webroot/assets/files/gefaxezevelo.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f3540e856d---jixagivir.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607015b369a78---xewimo.pdfIn PDF document text
    • https://cailux.lu/userfiles/files/xutuzibagoritezoti.pdfIn PDF document text
    • http://panziofabian.hu/fck_kepek/lagezu.pdfIn PDF document text
    • http://www.bandungmesin.com/file/felodekuxixeja.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/fdbd85098437c9580547111490df0efd/55764388694.pdfIn PDF document text
    • http://xn----dtbhwhggdaoqfh3d.xn--p1ai/media/file/gakebozuvuwowato.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/b2c6932987ce97cf51055bc8819b5da7/23726495804.pdfIn PDF document text
    • http://dvif.fr/userfiles/file/79547102955.pdfIn PDF document text
    • http://drxzhang.com/userfiles/file/panowugaxilekifapimutus.pdfIn PDF document text
    • http://emanuelmlevin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/8512759910.pdfIn PDF document text
    • http://niezapominajkowo.eu/userfiles/file/dafarelelabur.pdfIn PDF document text
    • http://paradisoseminatrici.it/userfiles/files/4811321115.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a629e707a96---wowutedebupotaxofal.pdfIn PDF document text
    • http://okuninka-biale.pl/userfiles/file/pagopamufugelosugajifovi.pdfIn PDF document text
    • http://stlnsk.ru/uploads/file/4461942313.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1607630cd4cd1f---50463995266.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/u55th14ciknge02kfraguhod47/39929931110.pdfIn PDF document text
    • http://gruppocreta.com/userfiles/files/51281218434.pdfIn PDF document text
    • https://fablab808.com/nbloom/fckuploads/file/20853063603.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=partitioning+shapes+first+grade+worksheetsPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c0c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0C5 2100 bytes
SHA-256: 56a2fd902e5b2e8ae05455f1298a625d6575d25162ada4e3f26c001bc3352c85
font_01_sfnt_off0000ca3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA3D 10912 bytes
SHA-256: a15a19f42f53edd4ca821e84bb0dfce801084fb291dc204ea5ac3c4245ddc8ca
font_02_sfnt_off0000e353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE353 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0000fb65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB65 16844 bytes
SHA-256: d80a161ac61a38f5580ec7a1c014e4b1b61054aeb012c03ab1604d209f8a3905

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