Malicious PDF — malware analysis report

Static analysis result for SHA-256 96cde0522193f338…

MALICIOUS

PDF

82.3 KB Created: 2021-09-18 04:20:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 60cd7adf5bae19c9429846110d49d5e6 SHA-1: 667150509441c83d05b1dce8ca765a7a1860c72a SHA-256: 96cde0522193f33801fd10d930981e57740175220d084995abbe7be82c9d2ba8
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting or compromised CMS uploads, indicative of a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://pistant.ru/uplcv?utm_term=asus+nexus+7+android+version PDF link annotation
    • http://htk2.altrodesign.eu/ckfinder/userfiles/files/84642907989.pdfIn PDF document text
    • https://saunadlaciebie.pl/userfiles/file/pobojobugagipejes.pdfIn PDF document text
    • http://yarpb.ru/pic/userfile/kapijebijetit.pdfIn PDF document text
    • https://villamishkan.com/310renonew/front/images/files/nuwese.pdfIn PDF document text
    • http://rcp-ranstadt.us/files/vofuxog.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/bufatibinasinusijum.pdfIn PDF document text
    • http://handbook.hu/upload/page/file/87585289386.pdfIn PDF document text
    • https://yantrasearch.com/ckfinder/userfiles/files/60936340678.pdfIn PDF document text
    • http://fields-on-earth.com/images/blog/file/wosenir.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/76873881775.pdfIn PDF document text
    • http://oshcongregation.com/userfiles/file/sojoxajoluwivumawiturok.pdfIn PDF document text
    • http://gbfrjournal.org/pds/userfiles/files/pogulifefede.pdfIn PDF document text
    • http://meetburgerusa.com/uploads/files/wuromalikilug.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/a4721a4caf4ae76ae0d923391f72477d/12442998756.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613dad1ba3d6f---1205089842.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16136542ab0120---ziwutalenubelilepikewe.pdfIn PDF document text
    • https://yp05.com/_UploadFile/Images/file/51887352757.pdfIn PDF document text
    • http://ls12368.com/userfiles/file/muzar.pdfIn PDF document text
    • http://unseretochter.com/images/file/fanudev.pdfIn PDF document text
    • http://hongsung114.com/files/fckeditor/file/2316985115.pdfIn PDF document text
    • http://tanriovermensucat.com/uploads/genel/files/87708338826.pdfIn PDF document text
    • http://rkenterprisesonline.com/FCKeditor/file/12070571212.pdfIn PDF document text
    • https://derya.afmiletisimajansi.info/resimler/files/25266103267.pdfIn PDF document text
    • http://noticiascgnews.com.br/ckfinder/userfiles/files/42576750400.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_off0000d96f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD96F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF181 19212 bytes
SHA-256: 716c0cd5f9be2a61d900ad930c4ed2270740ec657e1ece10bbf1409ae9f14b0e
font_02_sfnt_off0001238a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1238A 10396 bytes
SHA-256: 83a1022b4640f59fdbb0236fe1e6533d6b63113eb7085701e2fcbe7b01880531