Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc305d5047c74645…

MALICIOUS

PDF

80.6 KB Created: 2021-09-13 06:16:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 33e17e70a9eadde25b9ed1e594ddea79 SHA-1: 0b270e4dd50c447595e9425542dff92551292105 SHA-256: bc305d5047c74645a223733eac72c43a2381c06be6519d33ca108af06e24fad2
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document that contains numerous embedded URLs, many of which point to suspicious domains or IP addresses. Heuristics indicate it functions as a link farm, likely intended to redirect users to phishing sites or download further malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • 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.
  • 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=windows+7+iphone+hotspot PDF link annotation
    • https://asiantms.com/ckfinder/userfiles/files/nonojazinipalogozarufabo.pdfIn PDF document text
    • http://luchetti.it/userfiles/files/kosepuwivuzotowavajalaru.pdfIn PDF document text
    • https://maria-galland.ru/files/file/wewepeje.pdfIn PDF document text
    • http://vnndt.com/Images_upload/files/93658207458.pdfIn PDF document text
    • http://studioingtassinari.eu/userfiles/files/mozodizexe.pdfIn PDF document text
    • http://charontrade.hu/data/file/41212291159.pdfIn PDF document text
    • https://fallsplat.se/bildbank/file/kawutawo.pdfIn PDF document text
    • https://bimore.vn/webroot/img/files/94486550139.pdfIn PDF document text
    • http://moscow-vernisage.com/files/files/61619457382.pdfIn PDF document text
    • http://bamor.org/userfiles/file/kerat.pdfIn PDF document text
    • https://egokituz.org/files/galeria/files/bekaxujuxo.pdfIn PDF document text
    • https://preciseenergygroup.com/media/86898664275.pdfIn PDF document text
    • http://sualpturizm.com/userfiles/file/gutujodokuwisebuvatumuwed.pdfIn PDF document text
    • http://desiaussies.com/ckeditor/uploads/files/83034416701.pdfIn PDF document text
    • https://eklyps.net/images/file/83643578991.pdfIn PDF document text
    • http://www.amedna.com/userfiles/files/paxenoxotegawavetamenuji.pdfIn PDF document text
    • http://140.121.180.103/ckfinder/userfiles/files/mobusefesivovuvinomuruj.pdfPDF link annotation
    • http://checopharma.com/upload/files/damusakuxin.pdfIn PDF document text
    • https://cleartunemonitors.com/ckfinder/userfiles/files/dariwivatojaxavipiwidawi.pdfIn PDF document text
    • http://shopabrang.com/images/files/63511644781.pdfIn PDF document text
    • http://ajeah-intl.org/fck_image/file/javelakurisujokon.pdfIn PDF document text
    • http://azinsaghf.com/cache/fck_files/file/xefeg.pdfIn PDF document text
    • http://www.saletime.gr/admin/fckfiles/file/wijaforufaromewi.pdfIn PDF document text
    • http://maudchristan.nl/ckfinder/userfiles/files/xutesoki.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_off0000d75d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD75D 10312 bytes
SHA-256: dccd2050a8746799cab4757048850e5f2af4962ee11b28470e24a07fcdd98483
font_01_sfnt_off0000ee9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9E 17992 bytes
SHA-256: f8d827f0790e19f7789cac69a4ddccff0987ba3f85221de4429cb71ea6ca59ba
font_02_sfnt_off00011d30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D30 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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