Malicious PDF — malware analysis report

Static analysis result for SHA-256 9be20302bd521264…

MALICIOUS

PDF

84.2 KB Created: 2021-09-15 16:44:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 22d5824d35e6e480b52d391461f31bea SHA-1: ee0030f3610f5b8fbbfce2e3f78804d5254d026c SHA-256: 9be20302bd5212640f3976604771cca260950f6c9d6889c8c48d0136dc26924d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed as a link farm on disposable hosting, likely to distribute further malicious content. While no scripts were directly extracted, the presence of numerous unknown URLs suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://frutapacargentina.com/ckfinder/userfiles/files/jibarelalesolagujiriroxi.pdf In PDF document text
    • http://clubesquilacoma.com/uploads/files/mipubenaxifikez.pdfIn PDF document text
    • https://sieuthimaycafe.vn/uploads/file/76733690538.pdfIn PDF document text
    • http://onthebroadway.com/CPD/adminpanel/upload/file/99600419254.pdfIn PDF document text
    • http://worshipedia.mobi/sites/default/files/file/36874109391.pdfIn PDF document text
    • http://wjcopy.com/upload/files/25570038707.pdfIn PDF document text
    • http://gemculture.com/userfiles/file/fevovofipozepe.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8e4d7b58f307dbcb2b73ef55827e0d27/tuzoli.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16140742b9b6d9---84407262794.pdfIn PDF document text
    • https://minhvuongthuphap.com/upload/ck/files/donavomenewolozuj.pdfIn PDF document text
    • http://ckattorneys.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mukamerit.pdfIn PDF document text
    • https://chambres-a-la-ferme-plouzelambre.fr/userfiles/file/10879513912.pdfIn PDF document text
    • http://maivietnamesecotati.com/uploads/files/ripawerirakuda.pdfIn PDF document text
    • https://barrierball.cl/ckfinder/userfiles/files/83075098000.pdfIn PDF document text
    • http://stressmanagement-karriere.de/userfiles/file/lakofoxozopaketom.pdfIn PDF document text
    • http://baohanhranghm.com/upload/img/files/59404622499.pdfIn PDF document text
    • https://newdesert.pl/userfiles/file/raxakewakejodutodilato.pdfIn PDF document text
    • https://tidurmalam.com/contents/files/sunevamesazuzodogaluxaje.pdfIn PDF document text
    • https://delaneyllc.cfonewsletter.com/ckfinder/userfiles/files/2957156462.pdfIn PDF document text
    • http://skinct.com/upload_file/file/Fl202109151617407798.pdfIn PDF document text
    • http://www.moyekolodin.com/files/farof.pdfIn PDF document text
    • http://sedaciesupravy.sk/media/file/wedipivilelaborajibi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=app+that+reads+web+pagesPDF link annotation
    • http://e1pl2.nazwa.pl/busy/fotki/file/72984856470.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_off0000e309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE309 18672 bytes
SHA-256: d06f197631515a080fb20fe78743b6f1aaf059968a90f7624b2dbe52f9528020
font_01_sfnt_off00011376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11376 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B8D 10516 bytes
SHA-256: 187aee344e0673b382e78c5a17b6d1adb83ff8bf155100fc5027656d8188976c