Malicious PDF — malware analysis report

Static analysis result for SHA-256 e605ef9e817d11a3…

MALICIOUS

PDF

97.5 KB Created: 2021-06-28 11:25:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f07d0a2c109eaf11c22591a6610d9528 SHA-1: 7b572e676b19114af89988f952120a72bccd9c91 SHA-256: e605ef9e817d11a35cc6d7267d7dec965b76277552fe51d7feb1084f554b785d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous embedded URLs pointing to compromised websites, which are likely used to host phishing content or distribute further malware. The presence of multiple external URIs and link farm heuristics strongly suggests a phishing or credential harvesting campaign.

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://allytemp.ru/uplcv?utm_term=another+word+for+endearment PDF link annotation
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/7ptejngvphmk34ie78tmth5vq5/konudezafobu.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/nemumoreverobe.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/7182babfce4c8146d6e9024a614cf27a/33898609692.pdfIn PDF document text
    • https://iwnta.com/userfiles/file/rebakobugikifeseruxaneb.pdfIn PDF document text
    • http://birnagarcollege.in/userfiles/file/xozajobuwevujo.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/b70dt5vtsejpjb9d9he9pqlra0/dowez.pdfIn PDF document text
    • https://divinenine.net/userfiles/file/lojamovezesatiwonexopamus.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad6580dc32e---101983235.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/901c86aabf14f8291581734829bf8f57/552682851.pdfIn PDF document text
    • https://protradingindia.net/userfiles/file/77695009336.pdfIn PDF document text
    • http://ahsaipu.com/v15/Upload/file/2021521445362881.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c83efaa267---vozaxemevitiwu.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/37d642d12129e7968df5a3e4741ee8e6/pujopujusuwe.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/lf0s99j4nnbeu5hq65mbtvgdu9/gesedejivolopinabigurifad.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/h4r75bfgha49cm7rj3p8648oli/tipekiduzigadas.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ea785aa28d---gotasuwom.pdfIn PDF document text
    • http://thefjordbaklawfirm.com/clients/876731/File/potonifuriled.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160caeb00757d8---kodudusiti.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baa7f6c2ca4---topesozegobi.pdfIn PDF document text
    • http://ciaooo.ru/uploades/userfiles/file/bamunemoxurutowusani.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/1600019800.pdfIn PDF document text
    • http://pogologistics.com/ckfinder/userfiles/files/logerogetapixekivix.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c7e356334---sijipawawabadalet.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011be1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE1 10380 bytes
SHA-256: 06db5b8798a00ad14b821a5d7919c12e6db053b5b8906bc81be42dc5902c3e76
font_01_sfnt_off0001333b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1333B 17576 bytes
SHA-256: 32482ab9ff58358998a167476597e9c1ccfa6e89d18c086e7a1104eba15da92b
font_02_sfnt_off00016117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16117 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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