Malicious PDF — malware analysis report

Static analysis result for SHA-256 625622132a8e956f…

MALICIOUS

PDF

84.8 KB Created: 2021-09-15 11:34:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: fd4ac94bd1cd1ebd50989eb3a7bbef35 SHA-1: ba44f33fc6fd2118a3510fadd42260599e8a29ff SHA-256: 625622132a8e956f7dc360cf93ebbc2df76dbf1ebb356fd1fc3e6d13ec221244
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, likely serving as a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://bostaninsaat.com/image/files/vatuxadafaxeposux.pdf In PDF document text
    • http://bbhshipyard.com/userfiles/file/kevafona.pdfIn PDF document text
    • https://kham.vn/userfiles/file/73305016189.pdfIn PDF document text
    • http://ambvetesopo.eu/userfiles/files/zasorelizofadizo.pdfIn PDF document text
    • http://140.121.161.111/ckfinder/userfiles/files/65228100857.pdfPDF link annotation
    • http://ihanzao.com/userfiles/file/20210904215626_1719881545.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f78194d051---gulizopaloxegojusujod.pdfIn PDF document text
    • http://miskolciharsona.hu/pictures/file/momigugoruliwi.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/b284fac1c61ad252a0452ee1a0201d45/xozik.pdfIn PDF document text
    • http://harryreichert.de/uploaded_pics/News/file/saluseziwexo.pdfIn PDF document text
    • http://lor-rostov.su/userfiles/files/buvawuweranokitojinamiw.pdfIn PDF document text
    • https://hsiaoying.com/userfiles/file/zifafadogegixadovi.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/beripiveja.pdfIn PDF document text
    • http://355353.ru/userfiles/file/69161598350.pdfIn PDF document text
    • https://mai-avto.ru/upload_files/file/27543935017.pdfIn PDF document text
    • http://hak-al.com/resimler/files/73595421989.pdfIn PDF document text
    • http://dr-onesrl.com/userfiles/files/rexukiguwazokekafu.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/11357137155.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/99301470790.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1613b4575e2c16---35263643192.pdfIn PDF document text
    • http://sichera.eu/userfiles/files/xopomutizib.pdfIn PDF document text
    • http://gernano.eu/gfx/userfiles/files/tezinebumofosakadefilazot.pdfIn PDF document text
    • http://bckbytow.naszbip.pl/img/upload/files/2965258543.pdfIn PDF document text
    • https://neksav.com/upload/ckfinder/files/86990352584.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=how+to+find+deleted+messages+on+android+phonePDF 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_off0000e47f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47F 11020 bytes
SHA-256: fe4bdb863b98a9e9308444fe910e39999b53a53a35d4929c5dd6132c1f03ad19
font_01_sfnt_off0000fdb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB1 18184 bytes
SHA-256: 47d814dc88f6ed3cdcc03995363492f5251603717c9d3f1241d785fe3e78915b
font_02_sfnt_off00012cd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CD7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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