Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4525ce15a80e2d5…

MALICIOUS

PDF

73.7 KB Created: 2021-06-23 11:49:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 8e07ac9aa059df806324c1841ab2aaa6 SHA-1: d09377a9115545ffdedbae67d6997577491fd450 SHA-256: e4525ce15a80e2d52cc4cb427f052091731ba03647a316d02f67c88c62104561
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body and extracted URLs suggest a lure related to media downloads, likely to trick users into visiting malicious sites or downloading further payloads. The presence of numerous external URIs and link farms, some hosted on compromised CMS uploads, further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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 https://philabc.ru/uplcv?utm_term=kaththi+songs+download+masstamilan PDF link annotation
    • https://menu2uplus.com/images/file/lokodibewemilimagosirag.pdfIn PDF document text
    • https://5uempat.com/contents//files/sodonatixa.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/8qbdac7214n3cl8vjepsfuae9j/99612949729.pdfIn PDF document text
    • http://shinex-auto.com/userfiles/file/jopudowijo.pdfIn PDF document text
    • http://mousike.it/img_ins/files/katuvuv.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/g2n5jq9kfvg54398qvr9vsvb7v/38604335226.pdfIn PDF document text
    • http://namngonviet.vn/user-/files/pofaregexisuzu.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/edtubppvimhbh1lo1hd18f8s5u/405492239.pdfIn PDF document text
    • http://brilspa.ro/userfiles/file/%5C/zajagirobezexubarifo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607573726b783---64626334841.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/6df8a94abbde8ae143d043990e9957b1/gedibidevux.pdfIn PDF document text
    • https://www.saammohaseb.ir/wp-content/plugins/super-forms/uploads/php/files/4ada6ecc3bd794de618bc3a4cd95e8c3/40558009241.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094aaa41b659---josodiladaxuzaj.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/4aaa5ac78671ae55c3b5648597e00f65/37529855012.pdfIn PDF document text
    • http://crmrealty360degree.in/userfiles/file/85802032170.pdfIn PDF document text
    • http://mixmarketing.vn/upload/fck/file/9798174168.pdfIn PDF document text
    • http://www.multigacos.com/admin/uploaded/fck/file/69896694429.pdfIn PDF document text
    • http://www.bufolari.com/public/immagini/file/wegenubifoz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A5 5204 bytes
SHA-256: 491dd54861fa9fa3142eed906f25212ce72bacb6047a65efc22deaec7cafeaba
font_01_sfnt_off0000f44f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF44F 11196 bytes
SHA-256: 5f38037725a8b62a607d1d2019ecff901f5910ddea48b3b80f162a42fe951c55