Malicious PDF — malware analysis report

Static analysis result for SHA-256 02212ab83f9570b8…

MALICIOUS

PDF

86.5 KB Created: 2021-09-08 04:33:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 519d7a12261b46aa5199fa47674cb130 SHA-1: f99af6942f592936a0154be82605b8492dabf1d6 SHA-256: 02212ab83f9570b86dec1acf079f347006d605b39b5d8d139e68c77b676ae0d3
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many pointing to compromised WordPress sites, suggesting it's designed as a link farm to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://crewmak.ru/uplcv?utm_term=anorexia+y+bulimia+nerviosa+en+adolescentes+pdf PDF link annotation
    • http://vmkmsz.hu/userfiles/file/zudufupudobek.pdfIn PDF document text
    • http://logisticsnetworks.net/ckfinder/userfiles/files/59637877790.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160b31d5c3a590---xutiwelosutagef.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8756bf389a---tazovutasirifiv.pdfIn PDF document text
    • https://rumusjitu.com/contents//files/topajijuzupuxoxela.pdfIn PDF document text
    • https://lyonsinn.com/nbloom/fckuploads/file/11142884348.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/bd06ffdd783333b0b296439ff39391f1/jizivuzixiberenafomotoxe.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/l5nao8cjo234shqv4le01a00pl/jelusos.pdfIn PDF document text
    • http://mtkshop.com/images/uploads/file/tosadovunuzilor.pdfIn PDF document text
    • http://bikaji.zohukum.com/ckfinder/userfiles/files/74960043038.pdfIn PDF document text
    • https://sieompaysdebray.fr/lesiom/txt/imgadmin/file/gudakiju.pdfIn PDF document text
    • http://kemenyseprosiklos.hu/upload/file/kesuponoguwazadotajurata.pdfIn PDF document text
    • http://anapro.com/ckfinder/userfiles/files/pedonidebunudanevefide.pdfIn PDF document text
    • http://okuninka-biale.pl/userfiles/file/tiperolilinesukofozeguxo.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e9cd7d7a14---7704582014.pdfIn PDF document text
    • http://somsit.com/ckfinder/userfiles/files/woxizakaw.pdfIn PDF document text
    • http://www.mediagrand.hu//data/editorfile/55985272538.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/6e506a28aef34b200824afe49800762e/safumiviwuj.pdfIn PDF document text
    • https://alpinashop.bg/files/bibeporerebidinivowuj.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/229002b22b67d5c7176318f438df32d7/6190722345.pdfIn PDF document text
    • http://dpsszczytno.pl/photo/file/fukagenev.pdfIn PDF document text
    • http://www.tokyomagic.jp/images/library/File/natife.pdfIn PDF document text
    • https://komunalno-vrgorac.hr/files/mepevaninubitol.pdfIn PDF document text
    • https://promaxsuspension.com/csmimage/file/92462523409.pdfIn PDF document text
    • http://caratow.nl/userfiles/file/midafematiredaxusuzavi.pdfIn PDF document text
    • http://gwhs79.com/clients/867100/File/60995492800.pdfIn PDF document text
    • https://www.kcequipment.com.au/wp-content/plugins/super-forms/uploads/php/files/ddf9ddccf9aa640544f9f8b602d3946b/vulibatek.pdfIn PDF document text
    • 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_off0000ea51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA51 18448 bytes
SHA-256: f83c991fcb3a4f62ff43fa8e158f27a14ec71800610e1e34892fbb7cc145f6a5
font_01_sfnt_off0001194a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1194A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13161 11284 bytes
SHA-256: e2a4444d3e0e03954638ad30dd9ef59c6b9356ebb32d9a500220399a059259e1

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