Malicious PDF — malware analysis report

Static analysis result for SHA-256 625e42176a54968c…

MALICIOUS

PDF

79.0 KB Created: 2021-09-13 05:05:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: d2c105b694d3064c6768e6ddfe2c722b SHA-1: 70aa5d345bf33644cd379b249a309999865b913c SHA-256: 625e42176a54968c46108b68a2629dee8c78d7dd05122e61a62bcd40b615d480
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, a common tactic for phishing or distributing further malware. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards an attack pattern involving redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6549

Heuristics 4

  • 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
  • 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://tailormade-sales-marketing.com/userfiles/file/niviz.pdf In PDF document text
    • http://kbchina.de/upload/geremaxorepumijawaxape.pdfIn PDF document text
    • http://touristclub.in/userfiles/file/tidetuwe.pdfIn PDF document text
    • http://www.lircai.com/web/inline/file/kawadinisef.pdfIn PDF document text
    • http://bikaji.zohukum.com/ckfinder/userfiles/files/98198521592.pdfIn PDF document text
    • http://www.sudeshnamaulik.com/fckimages/file/72755110866.pdfIn PDF document text
    • http://marathon-gexin.com/Uploadfiles/files/28938733973.pdfIn PDF document text
    • https://milsagliksen.org/upload/ckfinder/files/makatumazunowafitikozo.pdfIn PDF document text
    • http://dxline.eu/userfiles/file/xasuvufowogasibanokas.pdfIn PDF document text
    • https://bawauang.com/contents/files/lizelowanozojovurepoxegop.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/tuxedozojupa.pdfIn PDF document text
    • https://tauthuy.vn/upload/files/sowenuxasorowiwofujupaxu.pdfIn PDF document text
    • https://srccaa.bdbabymart.com/app/webroot/ckfinder/userfiles/files/legujurukegibuwibo.pdfIn PDF document text
    • https://kozlovka.mebel18.com/uploads/files/98408050349.pdfIn PDF document text
    • http://cappellastudio.it/userfiles/files/beboxipiratowutifilekasi.pdfIn PDF document text
    • http://jarauwerdaenzn.nl/userfiles/file/23914249203.pdfIn PDF document text
    • http://www.tomasjelinek.com/img/pub/file/jupubukafe.pdfIn PDF document text
    • https://www.prshots.com/ckfinder/userfiles/files/72696010367.pdfIn PDF document text
    • http://azinsaghf.com/cache/fck_files/file/pevaberekokexovugikoxe.pdfIn PDF document text
    • http://sevenseahotel.com/uploads/images/files/wixokukozonemiwozorulusi.pdfIn PDF document text
    • https://giltmorestukko.hu/ckfinder/userfiles/files/21357847381.pdfIn PDF document text
    • https://intervalhousehamilton.org/ckfinder/userfiles/files/22135136427.pdfIn PDF document text
    • http://e-sheremet.com/img/24172243751.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613da94b32b83---vovarinujewunafulixojoji.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/31041964722.pdfIn PDF document text
    • https://beautydiction.com/ckfinder/userfiles/files/5354632957.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=android+photo+editor+open+sourcePDF link annotation
    • 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_off0000e04a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04A 10484 bytes
SHA-256: 6d32367bf8623fcd0b3b96ff7c7222478872fec4adbb2b0d0561333f52a7a5f5
font_01_sfnt_off0000f815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF815 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11027 17316 bytes
SHA-256: 5415263df6841532b03a5ab8fa07b6518130f04ad0881147159fbd442c1d0ce2

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