Malicious PDF — malware analysis report

Static analysis result for SHA-256 bee42cdf122a2fdd…

MALICIOUS

PDF

83.9 KB Created: 2021-08-12 21:47:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 29a8f23fbacbcbf8545ee9fffcbafc5c SHA-1: fa27dee8041efa402e8e5b0ff021c4cfd50fc32e SHA-256: bee42cdf122a2fddbd960a80f949e822aa149382107395f3a4f3c1a7de0e5083
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains a large number of external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malicious content or manipulate search engine results. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://laborke.ru/uplcv?utm_term=powerline.io+hack+download PDF link annotation
    • http://aplus.to/userfiles/file/41703685244.pdfIn PDF document text
    • http://hkalc.com/userfiles/wavoxiwapojulomi.pdfIn PDF document text
    • http://winteringlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/73765070690.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/a2e092c27b8337bbd19c4d71110ea24e/44653412412.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/q0kk0inu88u3hcceak9u7mgne1/lenazaxulorokixavus.pdfIn PDF document text
    • https://chptravel.ir/data/file/23443362760.pdfIn PDF document text
    • http://tort-art.ru/userfiles/file/vafovonorilagiwar.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/vipexoxotenib.pdfIn PDF document text
    • http://nail-free.com/ckfinder/userfiles/files/17995365451.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/luwidad.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-5-6/20210506200400733964.pdfIn PDF document text
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d16f1456c1---rimofumunelur.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/madulixibepegovamizo.pdfIn PDF document text
    • http://lamorenj.com/userfiles/files/sovuxaluxenulowobazut.pdfIn PDF document text
    • https://10kshot.com/customerinterview/ckfinder/userfiles/files/kigazoxavox.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609282ff8df27---lopovoberubikepep.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb33e6b7e0f---rotukanugaxekuladonetu.pdfIn PDF document text
    • http://kimwendelldesign.com/ckfinder/userfiles/files/kidadogirefufurelod.pdfIn PDF document text
    • http://andreaslasnik.com/data/files/xonotetigapexipububis.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16096c8f7417cb---bibokanidifinodek.pdfIn PDF document text
    • http://zs-oilfieldequip.ru/d/files/vakebijexojokixuvegefilo.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/95626979835.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160e258bcb1155---poditirokutefobinawimelab.pdfIn PDF document text
    • http://www.oteliapelsin.ru/ckfinder/userfiles/files/40736591703.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB2 10448 bytes
SHA-256: dceaa4c896bdcb977b763802dea7fdb1aaa606a779d33d7f43843b2cb3acd49b
font_01_sfnt_off0000f351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF351 1760 bytes
SHA-256: 478d64aad58a46c60a63c2bd6d05d9c39068b35528f549688063ac651822ff24
font_02_sfnt_off0000fbac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000113be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113BE 16876 bytes
SHA-256: 934727effb839d3ee63fb7b36921f1ee0700fc51f7e27e6e85b8e40c07a925a9

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