Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4149c6524947e2a…

MALICIOUS

PDF

96.2 KB Created: 2021-09-03 07:27:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 0a8a95f7803757091abc4a6d94cc4240 SHA-1: ec11322411521bb9994e9956de3da4896c53232d SHA-256: e4149c6524947e2a1b6c4cda336a2079bddaf060a1a9c1d4d0590791ed011e92
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing embedded JavaScript, which is a common technique for exploiting PDF viewers or delivering malicious content. Heuristics indicate the PDF acts as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/d7or62oaiu99fhbr48ms4v43s7/40749012542.pdf In PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8f934d4a3---lasaxarimewodolesobul.pdfIn PDF document text
    • http://maychamsocda.vn/images/userfiles/file/62224488704.pdfIn PDF document text
    • http://dellalontra.it/userfiles/files/88534391324.pdfIn PDF document text
    • http://laulumaja.fi/ckfinder/userfiles/files/42884492646.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607018e933637---27464865629.pdfIn PDF document text
    • https://altinhediyeler.com/calisma2/files/uploads/60194114694.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d2425715d---23422332741.pdfIn PDF document text
    • http://graficaeformazione.it/userfiles/file/sunupazamopurej.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be696bd2f8b---laxopuwopijofijez.pdfIn PDF document text
    • https://best-label.com/upload/files/81800742232.pdfIn PDF document text
    • http://ttccid.com/userfiles/file/37492982377.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1611054f8e5b02---66257430968.pdfIn PDF document text
    • https://ahreco.com/uploads/news_file/lodupomasuxujidaxotuwepow.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/pkfoeoeeocte7pfk6v1vkkjd92/31974899017.pdfIn PDF document text
    • http://cuacuonductudong.com/upload/files/bojesagezoxebeta.pdfIn PDF document text
    • http://icmasistemas.com/userfiles/files/rulosuruxagel.pdfIn PDF document text
    • https://ocw.tw/uploads/files/mipubaw.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/d94f1af213c01e1885b9eb31ac72059a/89942518753.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/fidudixupagilubofawadepig.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/cf8f4833de535589d9322ce51306d334/55738567937.pdfIn PDF document text
    • https://xn--bankkrtya-41a.hu/js/ckfinder/userfiles/files/82485263828.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/b985a46a2b0e38ae2660caaf2cbe72b5/54538025400.pdfIn PDF document text
    • http://mpti.ru/userfiles/file/90740469524.pdfIn PDF document text
    • http://fuguchair.com/upfolder/e/files/20210826155744.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=%D8%AA%D8%AD%D9%85%D9%8A%D9%84+%D8%A8%D8%B1%D9%86%D8%A7%D9%85%D8%AC+pdf+2018+%D8%A7%D9%86%D8%AF%D8%B1%D9%88%D9%8A%D8%AFPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000e2b9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xE2B9 30672 bytes
SHA-256: 31456dbe9d66e1b8bd7279e06bca5a86a471570b9c09985148cde0e35256799b
font_01_sfnt_off000118e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118E1 9872 bytes
SHA-256: 35b20e4739cdb02e9901dad8bb8d2a5794d2dcc61a8f2e5148eff6b19e3d402d
font_02_sfnt_off00012eba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EBA 18476 bytes
SHA-256: 1acc3fb872bb475810f215b8e97f994aecb93367c9589283e100d2aaaa7a7413
font_03_sfnt_off00014c53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C53 14364 bytes
SHA-256: 3c2b60c50760a120bfce99146e44f1bc75ebddd56ea3c4137d50ba41660b2baa

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