Malicious PDF — malware analysis report

Static analysis result for SHA-256 edb3563480b79f37…

MALICIOUS

PDF

83.1 KB Created: 2021-09-08 21:59:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 8686110789019c99d54f61deeb6f694b SHA-1: 228cbd09bb2e82a2748508b05f8df6cc4ece48e5 SHA-256: edb3563480b79f371c23bb8bae43c47a68d0c710bcfeab39ef326ece6fee635e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or redirection scheme. Although no scripts were explicitly extracted, the nature of the embedded URLs and the detection signatures indicate a malicious intent to lead users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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
  • 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 http://ithalattagarantibelgesi.com/resimlerfiles/63525693252.pdf In PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136b79c10273---sanulemojipuj.pdfIn PDF document text
    • https://afmiletisim.com/resimler/files/puzurakopuwixivoso.pdfIn PDF document text
    • http://jtg-antracyt.pl/files/file/67781436049.pdfIn PDF document text
    • http://lawngo.net/fckfiles/86295833659.pdfIn PDF document text
    • http://signauction.net/userfiles/file/lupexiguxibipexubovojat.pdfIn PDF document text
    • http://pereplanirovkaoblast.ru/pict/file/71668003224.pdfIn PDF document text
    • http://kahasat.cz/data/file/kevipuvemo.pdfIn PDF document text
    • https://dichvumoinoi.com/ckfinder/userfiles/files/87133893199.pdfIn PDF document text
    • https://economiadecomunion.net/ckfinder/userfiles/files/46847434236.pdfIn PDF document text
    • http://indcms.testingmachines.com/images/file/71970643702.pdfIn PDF document text
    • http://hoangduy.vn/vn/files/vanemizaxuk.pdfIn PDF document text
    • https://spirit-legend-enterprises.com/webroot/editor-uploads/files/nezifavifibuwabejadisogen.pdfIn PDF document text
    • http://oecschool.com/userfiles/file/famenapokewa.pdfIn PDF document text
    • http://esipro.lu/userfiles/file/jamotibexonumomitavozi.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/0ba89e06f6fd81339ec91c31bec5efa8/20826801328.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/34090509489.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16138cf577f0b0---43905510186.pdfIn PDF document text
    • http://chandravanshi.com/userfiles/file/83553274858.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/75510036122.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613626c0acc34---levarajijamisem.pdfIn PDF document text
    • http://turinhotelcompany.com/userfiles/files/560635012.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/wagalixoxowotalajasudebu.pdfIn PDF document text
    • https://chrmglobal.com/userfiles/file/21024426897.pdfIn PDF document text
    • https://hglobaltourb2c.com/FileData/ckfinder/files/20210902_D77A7521920EA07C.pdfIn PDF document text
    • http://elektrostroy.kz/ckfinder/userfiles/files/fuparuvokefufabi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=wwe+raw+ppssppPDF 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_off0000e100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE100 18352 bytes
SHA-256: 536e65f78c8a5e00a13e9cbc072f79e3c5c379b25bd8fea1efc1046169da074d
font_01_sfnt_off000110d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000128e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128E8 9864 bytes
SHA-256: 8d159f485870ddd82a89ba6eca60a53e74b4c0ae6531e2542b3600c6c2f7d214

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