Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7d63c68dfb08ec8…

MALICIOUS

PDF

119.9 KB Created: 2021-06-21 09:34:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: b9c4c5cef102d639af4232f697c2ff65 SHA-1: fe8c5199b17044cfa7e78e25642dd124b666d38b SHA-256: e7d63c68dfb08ec8471d1df65196ecfa019aaba746c66e9662b702408df6394a
164 Risk Score

Malware Insights

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

The PDF file contains numerous links to compromised websites, many of which host other PDF files, suggesting a link farm designed to distribute malicious content. The presence of a 'download button' heuristic further supports the lure-based attack pattern. ClamAV detection and ML classification strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9902

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/734ec62d34e6ce062a023a7acbcab653/bupevaned.pdf In PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160923b7617cc8---revan.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/8dbc35f5e99150f5ca0a7e5871ec4634/29220890321.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ca46f15af---wugiponugamotovuwevixiso.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/opc17oo4hrl3pu2gj3qk84fcr2/pifixigadepolasokuzilanus.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/96325537123.pdfIn PDF document text
    • http://www.toptehnik.si/images/pisevulafuwadazisurawuti.pdfIn PDF document text
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/mb5pfp583gq3q3r57afqrtkf6g/38672618064.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/a80e19991a70db73bf64a58428bd2ab7/76455285618.pdfIn PDF document text
    • http://vuatoyen.com/uploads/userfiles/file/50006719385.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c5eb2c30e3---tupizenojiloxajatukewa.pdfIn PDF document text
    • https://burgas-remonti.com/userfiles/file/63929106151.pdfIn PDF document text
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/94928943821.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/20577461561.pdfIn PDF document text
    • http://eurogeographyjournal.eu/admin/fckfiles/file/gijalimuxexi.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/0d0044033591370c0875d74a2fd88fb7/99330763284.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
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=rab+ne+bana+di+jodi+tamil+dubbed+tamilrockers+free+downloadPDF 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013e75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E75 6832 bytes
SHA-256: 17c3336abb749b752741f04d2938c76c27d6dc65069db69ffe54f0239b79334a
font_01_sfnt_off00014fc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FC0 5548 bytes
SHA-256: 19dc73e1431c92727b5aff4bf272114a6bb5d7a6e840763edbc98ef9228f2f6c
font_02_sfnt_off0001629c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1629C 6000 bytes
SHA-256: 1d4598f3ddb752508ee29ff1886216e33918c912ec98b9248264d5adeaee9637
font_03_sfnt_off00017620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17620 17860 bytes
SHA-256: 52019593fb087fede9dc9b06a53663601cb24b60f39bb8a1b4f41293dbc9e161
font_04_sfnt_off0001aab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AAB6 16400 bytes
SHA-256: 3be62b2275759c9fe9bb9349c803ede1ea825e9272a275d16f64f6876dbd50ea
font_05_sfnt_off0001c0ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C0CE 3924 bytes
SHA-256: 67ccd9d4f20326888ec633e7260a997392bc08f20562dbe94e62e0b3e14c938c

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