Malicious PDF — malware analysis report

Static analysis result for SHA-256 6be79ca30024235f…

MALICIOUS

PDF

87.1 KB Created: 2021-09-19 02:24:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7b7d70020b98c76e6348c8d829642a89 SHA-1: 89e41fd6c70219839c8f4f489c3d63742db0439c SHA-256: 6be79ca30024235f9324130af7c713910ceaa307c6f8c77d590e232d07e0833e
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier as malicious. It contains numerous external URIs pointing to potentially malicious domains and IP addresses, indicating a redirection scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a link farm on disposable hosting, further supporting a phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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
  • 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://smidgel.ru/uplcv?utm_term=us+2019+putlocker PDF link annotation
    • https://bostoncake888.com/UserFiles/files/xuvalu.pdfIn PDF document text
    • http://greensquares.in/userfiles/file///momitopu.pdfIn PDF document text
    • http://myrbacken.se/login/ckfinder/userfiles/files/galamulibazewomomatetures.pdfIn PDF document text
    • http://networkinglikepro.com/ckfinder/userfiles/files/67056564562.pdfIn PDF document text
    • http://www.mousumibanerjee.com/fckimages/file/5026176151.pdfIn PDF document text
    • http://c-amc.com/upload/files/dijinixumegani.pdfIn PDF document text
    • http://pcccphucvinh.com/upload/files/27984083414.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/15dd07508460a6ff4379704271823abb/48264872792.pdfIn PDF document text
    • http://xn--22cjbbm2eyae3ehabdb4kqdtae3dxnnc1fhf.com/user_img/files/7238111397.pdfIn PDF document text
    • http://xn--54-dlcdkamdj4btild5b.xn--p1ai/ckfinder/userfiles/files/69346394046.pdfIn PDF document text
    • http://kiko168.com/UploadFile/file/20210913031242174.pdfIn PDF document text
    • http://bkm-market.net/userfiles/file/pulam.pdfIn PDF document text
    • http://mastervin.ru/files/file/notafafavomadukigere.pdfIn PDF document text
    • https://homestayhoian.vn/uploads/image/files/vokusibanom.pdfIn PDF document text
    • http://140.121.161.111/ckfinder/userfiles/files/givolu.pdfPDF link annotation
    • http://bangladeshceramicsociety.com/uploads/editor/files/96186118774.pdfIn PDF document text
    • http://onfireinteriors.com/userfiles/18093656462.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/fb23d62ce75d4861f878f18dcbb8150e/5891704219.pdfIn PDF document text
    • http://intertexmedical.com/userfiles/files/kinikorolekogobago.pdfIn PDF document text
    • http://hzbaoyan.com/images/upload/File/56440275080.pdfIn PDF document text
    • http://geodeslaboratori.eu/userfiles/files/baloninunaxepi.pdfIn PDF document text
    • http://elijasprojekts.lv/files/file/jimekike.pdfIn PDF document text
    • http://hutnia.pl/userfiles/file/78632647674.pdfIn PDF document text
    • http://gernano.eu/gfx/userfiles/files/fibowujibonoki.pdfIn PDF document text
    • http://aurastaffing.es/upload/file/lasusizefewivufudubiguve.pdfIn PDF document text
    • http://thebeautyofdesign.nl/ckfinder/userfiles/files/sunumab.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_off0000eb95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB95 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000103a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A7 19268 bytes
SHA-256: 5e1544a3c062ce42266df8781e79cfe83044eeb9050bf9d599a0ada050b898c9
font_02_sfnt_off0001362b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1362B 10668 bytes
SHA-256: 4607d9e777d7453f1c609245bf9be9444a915b95dad5a5e5649f4af40e767eb1