Malicious PDF — malware analysis report

Static analysis result for SHA-256 e580ca613b47dcf6…

MALICIOUS

PDF

89.3 KB Created: 2021-09-04 23:21:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7983bea49a8f082bf1105077af06c662 SHA-1: f7276d6df467f0aa776269232b0383e2fbe41064 SHA-256: e580ca613b47dcf6bfb21ae5afc2cbe3f5c053d890a55260741935935cee29a6
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with many embedded URLs pointing to various domains, some of which appear to be compromised CMS upload directories. While no scripts were directly extracted, the nature of the embedded URLs suggests a redirection mechanism, likely to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://euroear.eu/ckfinder/userfiles/files/7697822134.pdf In PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ae89a462c3c---bujelojubozinapobo.pdfIn PDF document text
    • http://bosch-service-center.ru/uploads/files/bezusifadilide.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd21f58959---14652107726.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/jizeru.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160786a39acb78---61329841817.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/b1340266c562f10564c9116240d53926/sukevokarugewiponetopoz.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/p8vot12vrrvg5cmboanh7efta5/20955876744.pdfIn PDF document text
    • http://nakakinpump.kr/fckeditor/upload/file/wogiwat.pdfIn PDF document text
    • https://cleartunemonitors.com/ckfinder/userfiles/files/sirewimijaxoper.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160860a4855436---79597065070.pdfIn PDF document text
    • http://derma-dts.de/files/file/56063470503.pdfIn PDF document text
    • https://worldcastlive.com/userfiles/file/68657163303.pdfIn PDF document text
    • http://ricarda-allegra.de/userfiles/file/38176496193.pdfIn PDF document text
    • http://liderzy.natura2000.pl/imgturysta/files/34564015221.pdfIn PDF document text
    • http://safeabortionnepal.com/userfiles/file/41344917074.pdfIn PDF document text
    • https://www.naturartshop.com//ckfinder/userfiles/files/78340550355.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16098b08a1c1de---85493558751.pdfIn PDF document text
    • http://csc010.com/userfiles/file/20210723193203_7m4286.pdfIn PDF document text
    • http://simonide.org/userfiles/file/zijixujajozilowisipeg.pdfIn PDF document text
    • http://stainless-faucet.com/uploads/htmlupload/files/moxalakebajeropomax.pdfIn PDF document text
    • http://tourbusan.net/FileData/ckfinder/files/20210607_68A45DC722A574F6.pdfIn PDF document text
    • https://rumahbaruku.com/contents//files/moralekugejelajopun.pdfIn PDF document text
    • http://inlygiaylynhua.com/upload/files/39292056992.pdfIn PDF document text
    • http://liga-stf.ru/i/upload/files/30781799668.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=feldene+bula+pdfPDF 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_off0000f402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF402 10132 bytes
SHA-256: a8c0946619488523b1158ce9448bff4973b351e559f13a2895206f524228118c
font_01_sfnt_off00010a74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A74 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12286 20112 bytes
SHA-256: 45d4e04e19b241a0f592c784d10c70a0d9a73eba02aac671f6a68b961a2476c3

Open this report in the interactive analyzer, or submit your own file for analysis.