Malicious PDF — malware analysis report

Static analysis result for SHA-256 32cd72a7f0365c57…

MALICIOUS

PDF

84.2 KB Created: 2021-09-19 22:51:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d3f4b7d307abcff52cf38b0e15728afe SHA-1: 438570caf19eb0729fd878ab6bdda8ae306f88b5 SHA-256: 32cd72a7f0365c5779c94a36f5a3db65019cde210aaa32c041c91117dd559c3f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs pointing to external PDF files, suggesting a link farm or redirection mechanism. The PDF structure and embedded content are consistent with attempts to disguise malicious intent, likely as a lure for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://yellowmangocafe.com/userfiles/file/99698894887.pdf In PDF document text
    • http://e-hematologica.com/users/file/58968014722.pdfIn PDF document text
    • http://abnigakgdsg.friendship-match.com/upload/files/wotino.pdfIn PDF document text
    • https://rosedreamholidayhomes.com/ckfinder/userfiles/files/nizofuda.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/gojofawegakusituvaxok.pdfIn PDF document text
    • https://prestinireedcorp.com/userfiles/files/sikuzimafalokegoxumujab.pdfIn PDF document text
    • https://lbk-ingatlan.hu/uploads/file/vozuzoralipamojiwuz.pdfIn PDF document text
    • http://appartenvue.net/appart/upload/images/26868882577.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/bisodowoxavatonujuz.pdfIn PDF document text
    • http://bayzones.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/xudelozojot.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/9c21be1fbf6d5e7e6dff197e78eb9c7a/74174014996.pdfIn PDF document text
    • http://rfaaa.com/UploadFile/file/20210913195457258.pdfIn PDF document text
    • https://www.orthovision-lublin.pl/ckfinder/userfiles/files/303196266.pdfIn PDF document text
    • http://kperrylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lulisijonepodiguribev.pdfIn PDF document text
    • https://educhina.mn/editor/files/jujutuzuxonuguwo.pdfIn PDF document text
    • http://kiajihlava.cz/UserFiles/File/pakagusefato.pdfIn PDF document text
    • http://fields-on-earth.com/images/blog/file/zones.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/208322417661449e3026417.pdfIn PDF document text
    • https://kidneystonetreatment.in/userfiles/files/raralawojeturuxis.pdfIn PDF document text
    • http://etasystem.net/userfiles/files/81129648237.pdfIn PDF document text
    • http://mp-journal.com/media/file/191126209.pdfIn PDF document text
    • http://teenmag.cz/userfiles/file/77312546708.pdfIn PDF document text
    • http://chengzechem.com/upload/files/29066623120.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/f8463203c02396c2a7350a4727df89fa/6813106225.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=instagram+rocket+apk+androidPDF 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_off0000e119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE119 18884 bytes
SHA-256: 14cf6534cf03ac601ab3120ebc1c2254659c3358bd5cd496c88102972f067757
font_01_sfnt_off00011279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11279 10852 bytes
SHA-256: cea4681cc2f5b9d491bdba0c89a64dbab3e8cd0529bd557e69408efadf465593
font_02_sfnt_off00012b52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B52 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1