Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfcedd2ffce951c8…

MALICIOUS

PDF

89.6 KB Created: 2021-09-11 18:51:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ca49655112e7151fe4b63f33161036bc SHA-1: 5651c4d32d90727dbf4f7548c06f1457e70f9e3b SHA-256: bfcedd2ffce951c8e84028a6c3e6c6e1cc0eb8385a74bf92320d59e5fb901bef
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing and secret recovery lure. It contains numerous links, many pointing to compromised websites or disposable hosting, designed to trick users into downloading further malicious content. The presence of these links and the nature of the lures strongly suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://acelybio.com/upload/files/41881406768.pdf In PDF document text
    • https://granitnet.hu/editor_up/rowolivobusipexi.pdfIn PDF document text
    • http://axwelindia.com/uploads/36756945452.pdfIn PDF document text
    • http://uniondrygoods.com/fckeditor/userfiles/file/jazumigalozunekovu.pdfIn PDF document text
    • http://ladyvenus.it/userfiles/files/84587775167.pdfIn PDF document text
    • https://nationalshield-uae.com/userfiles/files/40228289138.pdfIn PDF document text
    • https://unitedfightalliance.jordanadams.com/ckfinder/userfiles/files/14047950808.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16136e71f5b2cb---44375317928.pdfIn PDF document text
    • https://arrad.ch/modules/ck/ckfinder/userfiles/files/fajikifazefabaz.pdfIn PDF document text
    • http://sattosushi.com/uploads/files/50559884269.pdfIn PDF document text
    • https://www.ebenisterie-burette.com/ckfinder/userfiles/files/jebizeri.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/50a64f0045c03f7c47651cdfd8c16f0c/zakitagoradu.pdfIn PDF document text
    • https://www.prieur-equipement.com/ckfinder/userfiles/files/mesup.pdfIn PDF document text
    • http://www.ccengis.be/applications/ckeditor/addons/ckeditor/ckfinder/userfiles/files/22753142715.pdfIn PDF document text
    • https://drjou-vc.com/upload/files/tirumedebejug.pdfIn PDF document text
    • http://edilgroupdigiovanni.it/userfiles/files/63873357806.pdfIn PDF document text
    • https://santechnikosdarbai.lt/images/files/81434581296.pdfIn PDF document text
    • http://umhouses.com/uploads/files/pivasupizosuvudebujuvud.pdfIn PDF document text
    • https://mavachhaiphong.com/upload/files/livijiw.pdfIn PDF document text
    • http://metalzilembo.it/userfiles/files/28588442638.pdfIn PDF document text
    • http://aweibel.com/Photo/file/97938171348.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/nutevevuwusepeze.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/fbe4363e7e542beb985de0f4e7d57ea2/80263991912.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=download+an+android+emulator+for+pc+and+macPDF 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_off0000fadc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000112ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112EE 17344 bytes
SHA-256: 7f8c5c571ca9273296ab7ac47ac56f478e44ff0a998a54e5bddbd5f8cfcd2b30
font_02_sfnt_off00013fc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FC1 10800 bytes
SHA-256: e894e5fc077e0145c92b232c37ae58740ea9887d13e4ecb4954bb4b8a68479d7

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