Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bbba83cf5faef05…

MALICIOUS

PDF

83.6 KB Created: 2021-06-16 15:08:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1c06bb56c8965e11a742841dea8c69b2 SHA-1: e099641053a4fbc91c8e2c2ea2af278854da7870 SHA-256: 2bbba83cf5faef05ca938ccb176d87b1c16ba31c59861508ca33f56da20a0d5c
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a phishing or redirection campaign. The heuristic 'SE_PAYMENT_REDIRECT_LURE' strongly indicates the document's purpose is to trick users into believing there are new or changed payment instructions. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence score point towards a malicious intent to deceive users into financial fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://drafthe.ru/uplcv?utm_term=bharathiyar+books+pdf PDF link annotation
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/ff4d6eb0edf78278fc54cf02bbf8a8be/doguguwebafemiwaku.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/tpdfq95cej8hni8g4t6b79924m/nodofusuxipimotalib.pdfIn PDF document text
    • http://mobilesamara.com/img/files/file/bovomojudutud.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/hacfc6pop3s6p5mgqu380h1kd1/dutogotavimikifumofim.pdfIn PDF document text
    • https://ficsllc.com/wp-content/plugins/super-forms/uploads/php/files/53ct85vdj3ohj63t2bm0a3flv2/28638776985.pdfIn PDF document text
    • http://bezpiecznamlodosc.org/files/file/63441941458.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1606cef4899b43---97219880712.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/263b9b883e579bb883eaae0966b9bdf2/lolumexuxexiz.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/panometarifibigivugigir.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210507100601.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/afc764723cd8f4fd5ca065be810be1e5/82276990552.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile/%5C/2021052216455886.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/f7065632408f4f7a027db251e58f552a/jumirokubuzigibutal.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/8281b8141a3faad6b3db7a2fa8f6c567/994047274.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/4o0j4des47m4i1a2qfdcnp6c7n/57958476717.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160b861e443ffa---62081885622.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d28a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD28A 5452 bytes
SHA-256: 6a3949e64f9136ea7d8adb77c33fecb46d4bd639bdea18e3bf3ca464ddb6535b
font_01_sfnt_off0000e511.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE511 12504 bytes
SHA-256: 46922bd84f957857ad6061c3baa66d8d45afa3097f75368ecf9f65ab0f45cb93
font_02_sfnt_off0001046c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1046C 11392 bytes
SHA-256: b43852ee030bd560154543a08c64bf37e5474cd9eecdd811991defb64bb2b6e6
font_03_sfnt_off00012b6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B6A 16164 bytes
SHA-256: ebd2804bff382343e08f6a42dc45f69f4e794c08b23908ae60ba78ededae74b1

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