Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e47abc27a7e6f09…

MALICIOUS

PDF

83.7 KB Created: 2021-09-06 03:53:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6d05c3aa94eda6915dbe93f4323a4bc5 SHA-1: 55abd27e713f7f8de874d1c2a4a7caa195b8da95 SHA-256: 4e47abc27a7e6f09c56cd429ca4adb3e4db90e99882c88240da8492844be5203
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to various external URLs, some of which are hosted on compromised WordPress sites. The PDF's structure and embedded URLs suggest it is designed to facilitate phishing or malware distribution by presenting a deceptive interface to the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://krisoc.ru/uplcv?utm_term=all+power+3500+watt+propane+generator+manual PDF link annotation
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/0b81j9d5bnsu5uitkasorhf0ts/luzolu.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/90813652934.pdfIn PDF document text
    • http://mextro.de/upload/files/simidazimoreroti.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/fdcba2fa918f0a175048615cb012567a/xixelogesotidut.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a099cd7b9d8---11996879158.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/3a00b0372a2dc2c39870451d506a87ac/xakelutaludok.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609965b92ed60---bozivuzewakafonasam.pdfIn PDF document text
    • http://allycatering.com/userfiles/niwutamojulotexarud.pdfIn PDF document text
    • http://xn--l3cbpp3gh4a5g5c.com/userfiles/files/43468443894.pdfIn PDF document text
    • https://aedwea.com/upload/foto/fagodavenuxem.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0afb0b059a---tomodigipanegudasilikevav.pdfIn PDF document text
    • http://bephoangdung.vn/uploads/ckfinder/files/lufot.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfe99318134---xugojawesedimol.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/a922175662cb3bf29814dda3ddbed4d3/kevarafepokefotewe.pdfIn PDF document text
    • https://stephankeppel.com/userfiles/file/50310868871.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b8418eee8---26674110464.pdfIn PDF document text
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/71634942595.pdfIn PDF document text
    • http://allasclub.com/campannas/file/7751214119.pdfIn PDF document text
    • http://www.lukoilmarine.com/ckfinder/userfiles/files/joxulelofubezigafogudanif.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/792125540214b1ce1c0b7bd94a418dab/puzekoz.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/aff02b01542b164fc383ee360a5428d8/katajufijixapikerujeba.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/903adf29661f015408d10f55eba67dc7/42179695911.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/wogikesap.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f4027893c54---26830199081.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160853825a3c18---77209850801.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_off0000e284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE284 17612 bytes
SHA-256: d396ffd8141ffc440354bc1e7b9d2108caaa26be2568fc2932c82e40f98f7ecc
font_01_sfnt_off00010fbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FBF 10932 bytes
SHA-256: 1906ab660fd7cb6f469bc15e5130016050ab5e60c263d9e5647087d78cd0b2fa
font_02_sfnt_off00012932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12932 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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