Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea5eba97bcaab31a…

MALICIOUS

PDF

74.9 KB Created: 2021-09-25 10:55:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 76b2eef3f7a5c55245605066b2f03f38 SHA-1: 1ef1f21199bd4adbd8bb8d37f6a367960fab57e0 SHA-256: ea5eba97bcaab31ad2ad4a2885a70c6926e8949e22dd52c0947b9bdc55449f28
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of links pointing to various domains, many of which appear to be disposable or compromised, suggesting a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The heuristic 'SE_QR_LURE' suggests the document may also instruct users to scan a QR code, further supporting a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • 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.
  • 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://archism.ru/uplcv?utm_term=scan+code+and+download+app PDF link annotation
    • http://santehnika34.ru/images/file/765322329.pdfIn PDF document text
    • http://queensparkview.com/image/upload/File/xezokanototimasi.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161349328065e4---duriwixudepelibalojedosa.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/pobetimiwofagog.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/16135426bba827---19054152770.pdfIn PDF document text
    • http://stavo-bazar.cz/userfiles/file/boxoguv.pdfIn PDF document text
    • http://saovietgroup.com/upload/FCK/file/72772983257.pdfIn PDF document text
    • https://theptaynam.vn/upload/files/75156356886.pdfIn PDF document text
    • http://jeyadhurgatemple.com/userfiles/file/74715525219.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/63220022238.pdfIn PDF document text
    • https://clarkfamilybuilders.com/home/clark/public_html/ckfinder/userfiles/files/10409759669.pdfIn PDF document text
    • http://aeusjtu.pretty-match.com/upload/files/telerefilenasujona.pdfIn PDF document text
    • https://weborder.cloud/userfiles/file///30198215543.pdfIn PDF document text
    • https://academiapreprod.riportico.com/userfiles/files/mewolotezudapirin.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/161402e86a9c73---sifuxipu.pdfIn PDF document text
    • http://facyt.com.ar/ckfinder/userfiles/files/87666991597.pdfIn PDF document text
    • http://cplust.com/upload/serback/files/20210921194153.pdfIn PDF document text
    • https://stpatswatertown.org/ckfinder/userfiles/files/40990540073.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1614e7c77769b4---35880387610.pdfIn PDF document text
    • http://pvvc.cz/files/53968127174.pdfIn PDF document text
    • http://robertwestlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fodojupetelilusurave.pdfIn PDF document text
    • http://lindseyderence.com/userfiles/files/30975140040.pdfIn PDF document text
    • https://amoslodge10.org/ckfinder/userfiles/files/karuwogurivaseramomamo.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_off0000bd7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD7D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d58f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD58F 18916 bytes
SHA-256: 94f8f600767df38f4a969e7ac9c282d4950b20ca5ca204e7c8c78d1bbd0c6b56
font_02_sfnt_off000106bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106BC 10212 bytes
SHA-256: df897ed4a2678cc20f204bd0dfc6d2ef0813dcf7cf48f8c9693ab72de3982cf1

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