Malicious PDF — malware analysis report

Static analysis result for SHA-256 393dbf00654d90c1…

MALICIOUS

PDF

85.0 KB Created: 2021-09-07 14:09:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: be744559858abbbb569381f19a36350d SHA-1: 871c99b8dffa918c1287f9519d514a2046989179 SHA-256: 393dbf00654d90c1b4dda63ff2856d7108877ef13e859f0b3fa39b27e704d8af
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress sites or other disposable hosting, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious content or downloads via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://aviatechinform.ru/sadm_files/balajukego.pdf In PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/ddf26f1990cbc92ea7e7b6f53fdac2dd/28446978868.pdfIn PDF document text
    • https://ldcpc.com/ckfinder/userfiles/files/kawufiriwelig.pdfIn PDF document text
    • http://bsa.by/ckfinder/userfiles/files/mukedixorovi.pdfIn PDF document text
    • https://menu2uplus.com/images/file/2460379637.pdfIn PDF document text
    • http://yilip.net/userData/board/file/93670969970.pdfIn PDF document text
    • http://notariocprietoa.com/notaria/documentos/files/89541841414.pdfIn PDF document text
    • http://americanpetrochemicals.com/customers/CMS-IMAGES/file/pasafasexumedodiwe.pdfIn PDF document text
    • http://szpk.hu/_user/file/42779488473.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/08cb849da2cf464d6198936aada77c85/71693905493.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/1nc9sj2l7rba7ssjbrqrr6mgo4/sabos.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16085a3aba96f2---46088347694.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8db02e0a0---zubukixojulotugu.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/da23f84f0bc53c1eccbcbb58dd3caf4e/10778154754.pdfIn PDF document text
    • http://foodchemsino.com/d/files/genokosubixa.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/23aec0be1bac81f7a0b8c401777e1b11/ponusopo.pdfIn PDF document text
    • https://mldom.xyz/web/img/podborky/files/majetivibogagaxejabo.pdfIn PDF document text
    • http://kxnjl.com/userfiles/files/sasexixeropexofubenaso.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/1611a7f271fa96---10397678345.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/18028720997.pdfIn PDF document text
    • http://xn----8sbxab3abskk3a2j.xn--p1ai/media/file/siguseletojulaveloxibize.pdfIn PDF document text
    • https://narimasu-chintai.net/jcfiles/file/kimumetabino.pdfIn PDF document text
    • https://stmarys-perthamboy.com/upload/File/femebolozudunagulufi.pdfIn PDF document text
    • http://architettoannalisatinelli.it/userfiles/files/pimixikepa.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/l9h10mqtko5gcmd3s9ej3v6551/muradirokuwotejewa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=woke+culture+pdfPDF 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_off0000e736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE736 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF48 18416 bytes
SHA-256: cc37a1a1333e8c95529554a8d9e2aef75d9922d5bcdb1482b952ce1eb90f29c9
font_02_sfnt_off00012f5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F5F 10272 bytes
SHA-256: 277cf757b1af6981043268876ea70812c5f77c0f9cfef9dfd5cac11f42f2eef4