Malicious PDF — malware analysis report

Static analysis result for SHA-256 e932c56e1a5c7fae…

MALICIOUS

PDF

86.7 KB Created: 2021-08-09 14:52:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c42bf723ab1670293814ac7e939c37de SHA-1: 2302d7f6bd242f2efa4f6bd9eb6c55e95a2f2f15 SHA-256: e932c56e1a5c7fae913c4ca8186f3ce9790a8369fde389bf7f27716478938f4b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm pointing to multiple compromised websites, suggesting an attempt to distribute malicious content or phish for information. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://mehreganimaging.ir/images/upload/files/53066087013.pdf In PDF document text
    • https://tavio.ru/files/file/90032717044.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16092822d22236---14446365424.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/2756413246.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/n5l59jm93tjagea7dtctc59c4g/34606118778.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/v1lp82iphok2g50lqtru565e33/mubimisodibopirirajuk.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/95369867939.pdfIn PDF document text
    • http://champagne-marc-chauvet.com/images/files/raputusadaweminum.pdfIn PDF document text
    • https://elpollopaulino.com/cenavarra_userfiles/files/jutisalibotojonufob.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/533feacaa7552796031a87fc4092257c/rodopasujiwanumuwamoruv.pdfIn PDF document text
    • http://stigstudiotecnico.it/userfiles/files/26393011912.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///tibusizijagofazobob.pdfIn PDF document text
    • http://meta-min.com/files/95342224691.pdfIn PDF document text
    • http://strandedtattoo.com/file/12158353962.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/o9me3usbtv4o1a2n78iuqdpv3t/sabadeduxekuvu.pdfIn PDF document text
    • https://cebrigantina.com/025-CEB/images-editor/file/75304152752.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6b9ddc00a9---tejaret.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160920a15c904f---mawavex.pdfIn PDF document text
    • http://bawaconstructions.com/editorData/file/46772248436.pdfIn PDF document text
    • https://panama4d.com/contents//files/fupalezusumetikapesu.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/5330d9106b2b2f8f5809a4fc6190fe37/77577122631.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/29883774314.pdfIn PDF document text
    • http://www.cbs-emballages.com/upload/file/23579592686.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa843e5e385---lugixepirejes.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=yowhatsapp+apk+latest+version+7.50+download+for+androidPDF 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_off0000ee6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6F 11192 bytes
SHA-256: b06f54aca882d79b9aa59c3a09e42c5d89f282c6ee88bda93470e66c141ff567
font_01_sfnt_off000108bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108BB 16564 bytes
SHA-256: b2762a75a8129b83e61bb436bc0d3ecc78b7a14ba04d8f0da921281d78080cd9
font_02_sfnt_off000133ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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