Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1af1113e09a572a…

MALICIOUS

PDF

86.6 KB Created: 2021-09-07 13:08:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7028d0dac0ab48dc154627a907af37e2 SHA-1: 1954c4f899549b6036324a06fcec1248bb8ffb8e SHA-256: e1af1113e09a572a098a4cebf33d66d6076e10f6d3d48a619de44da94818b872
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites, suggesting it's used to distribute malicious content or phish users. The PDF structure and embedded URLs indicate a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://huntic.ru/uplcv?utm_term=gartner+magic+quadrant+storage+2018+pdf PDF link annotation
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aff4dd12ad---xeviwulexazawo.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/6cr34a4blnnp4nbedlb0nur8t3/49353918504.pdfIn PDF document text
    • https://cncostruzioni.com/userfiles/file/kedopomobuwogu.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/72513b87c268c6600533b67f07196043/21515677076.pdfIn PDF document text
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/6c50207139e3004eaf20c0a37a2505ae/77517523410.pdfIn PDF document text
    • https://jungleflightchiangmai.com/Uploads/files/70107683018.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/dudejibumumafufijuvemu.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609421e2a5135---serugogev.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160f666cbd3406---68361015462.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160830921b53ce---66412573093.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160863f204c0dd---jejijovo.pdfIn PDF document text
    • https://daiichigroup.net/uploads/news_file/4553226062.pdfIn PDF document text
    • https://dollarplus98.com/images/upload/files/53950404425.pdfIn PDF document text
    • http://issaproject.com/app/views/panel/ckfinder/userfiles/files/padizulafarugaredo.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/rpeloc1l070fn1qsoc6rcvd0t4/11253728864.pdfIn PDF document text
    • https://hr-serdahel.hu/images/file/66349205616.pdfIn PDF document text
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/82904477629.pdfIn PDF document text
    • http://chamdure.com/DATA/files/jilojapurewonubuxi.pdfIn PDF document text
    • http://cherriestattoo.com/ckfinder/userfiles/files/nomobarerafipu.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c24c2d51f29---73117096987.pdfIn PDF document text
    • https://viadagio.be/userfiles/file/73980408701.pdfIn PDF document text
    • http://www.hermosabeachbungalows.com/userfiles/files/97579807307.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd756aa330d---xuzotunimijek.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4sgia4rrk1fml1f1srsuo5col5/sakumividewe.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/78654afdba91ddfb9a8fa5e09d3201f8/5823133699.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_off0000e9e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E7 11704 bytes
SHA-256: 8591183950203f8cdc0a0c9aa7b927d38a284b1b6ee23eddf93e08b72f1321a4
font_01_sfnt_off00010563.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10563 18508 bytes
SHA-256: 65d119d3417aa3ac936849b714231131c1ce52776084fff5d80a5a2b1a150ec7
font_02_sfnt_off000134e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1