Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddf2bd14b853d1ae…

MALICIOUS

PDF

83.2 KB Created: 2021-09-16 01:57:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 4f0c775be9fdb1efe94a7bedc3018503 SHA-1: e2023e40ad11c6df98e4096bfed7ff416e264cef SHA-256: ddf2bd14b853d1aefd4aa78bd8f02009934776785ccb6e4c71d143c0f4ff0cdf
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The presence of numerous external URIs, including one that explicitly mentions 'download popcap games full crack', suggests a phishing or malware distribution attempt. Although no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious document designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://chcial.ru/uplcv?utm_term=download+popcap+games+full+crack PDF link annotation
    • https://esvigo.com/upload/files/kogesowenezugaxufusen.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/denosulogaxi.pdfIn PDF document text
    • http://smartwealthhk.com/userfiles/6696453554.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///202192124148469.pdfIn PDF document text
    • https://togeltop.net/contents/files/lamofupemudebazadatax.pdfIn PDF document text
    • https://lordoptika.hu/files/files/49030636029.pdfIn PDF document text
    • http://matonaklawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nufefukutitelanotesimax.pdfIn PDF document text
    • https://quatcongnghieput.com/uploads/files/sesijolowabozovolu.pdfIn PDF document text
    • http://slenderclub.cz/ckfinder/userfiles/files/12709225586.pdfIn PDF document text
    • http://sxhk365.com/uploads/file///52998623248.pdfIn PDF document text
    • http://dwallacelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xedafoxebowipatiz.pdfIn PDF document text
    • http://infinity8talents.com/userfiles/file/bugututu.pdfIn PDF document text
    • https://yp05.com/_UploadFile/Images/file/88606301174.pdfIn PDF document text
    • https://gospel-streams.com/asset/ckfinder/userfiles/files/35113804511.pdfIn PDF document text
    • http://telegid.tv/userfiles/file/25270309178.pdfIn PDF document text
    • https://livstyle.ro/home/livstyle/public_html/uploads/files/dumevuta.pdfIn PDF document text
    • http://teplo76.ru/uploads/file/lewazetoranekalem.pdfIn PDF document text
    • https://machnhaduong.com/images/uploads/files/82119543159.pdfIn PDF document text
    • http://esistore.lu/userfiles/file/fafelerexos.pdfIn PDF document text
    • https://thegioidongphuc.net/ckfinder/userfiles/files/dojep.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161363d041fb3c---38840809053.pdfIn PDF document text
    • https://perfecthospitals.org/ckfinder/userfiles/files/53719997639.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/60035752343.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1614041dd4937c---saraleb.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_off0000e06d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06D 11052 bytes
SHA-256: 6c148c9c08189d304dc23c6f4377e08c6db7240a5898abcecda7777e714e4bcb
font_01_sfnt_off0000f9fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FD 17680 bytes
SHA-256: 136920c9704d1d58ea7c9a5786d48d1f964972199835bb185c08799017393ddf
font_02_sfnt_off0001275e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1275E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1