Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cc4042f9968eb27…

MALICIOUS

PDF

82.1 KB Created: 2021-09-21 09:03:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 696789a12ede59d7860cc8c900eff10c SHA-1: 1fe3aede0204e8813613dcbc9b45affdd83f34d6 SHA-256: 8cc4042f9968eb278e18060e7a11175424d3fb80c101a225b8fa1fd41205a7b1
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many hosted on disposable domains, and employs lures impersonating cloud document sharing services. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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://irlanc.ru/uplcv?utm_term=send+from+iphone+to+android PDF link annotation
    • http://cerescommoditiesltd.com/Images_upload/files/jadabor.pdfIn PDF document text
    • http://anhuizpyy.com/upload_fck/file/2021-9-10/20210910223441287919.pdfIn PDF document text
    • http://fuyu.010bi.com/ckfinder/userfiles/files/46924072532.pdfIn PDF document text
    • http://templeton.sk/userfiles/file/42028587950.pdfIn PDF document text
    • http://cluboutletmoto.net/campannas/file/tivetafemuj.pdfIn PDF document text
    • http://petrduchek.com/files/35815399050.pdfIn PDF document text
    • https://sabunwangi.com/contents/files/fabep.pdfIn PDF document text
    • http://iswii.net/ckfinder/userfiles/files/50336648036.pdfIn PDF document text
    • https://asiantms.com/ckfinder/userfiles/files/91112573101.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/mugisimebinodarijudaxufif.pdfIn PDF document text
    • http://hcm-invoice.vn/hinhanh_fckeditor/file/58062363425.pdfIn PDF document text
    • http://palaciodelosnavas.com/userfiles/file/jikotojorudixitavegi.pdfIn PDF document text
    • http://sithome.com/upfiles/file/20210910081955.pdfIn PDF document text
    • http://mamnonsaokhue.vn/app/webroot/files/ckfinder/files/52534722086.pdfIn PDF document text
    • http://loadcell.vn/Images_upload/files/fitizuveru.pdfIn PDF document text
    • http://yongqingtech.com/d/files/12069768775.pdfIn PDF document text
    • http://hkalc.com/userfiles/ludinakilelu.pdfIn PDF document text
    • http://misr-consult.com/userfiles/file/44703342267.pdfIn PDF document text
    • http://st-ark.it/userfiles/files/68609529482.pdfIn PDF document text
    • https://pearproperties.in/userfiles/file/55718268549.pdfIn PDF document text
    • http://biplano.eu/userfiles/files/6931974390.pdfIn PDF document text
    • http://reclameindex.nl/images/uploads/lititepufovozawozewofiji.pdfIn PDF document text
    • http://ecole.ru/text/images/file/rumetogopifop.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_off0000dc5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC5C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f46e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF46E 17868 bytes
SHA-256: 445adc1ba514d76c45cd850ed60d3fd031f6ba22d9a6743de6afd2078ab8ee02
font_02_sfnt_off0001228b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1228B 10624 bytes
SHA-256: 67c16b95cde2667e824a5506abbea142b390a92dc2bc4bf17cfb3b69708f6e9b

Open this report in the interactive analyzer, or submit your own file for analysis.