Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e1c197e642167de…

MALICIOUS

PDF

73.6 KB Created: 2021-09-08 18:01:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 72de8200f0f2464433146dfd10252361 SHA-1: 1ef1b3162bc840213fbf39a2c7c0f5ef8683f4d2 SHA-256: 3e1c197e642167de253958599608abbe330187b498bf418e597ff45d40265307
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a machine learning classifier and ClamAV, indicating it is likely a phishing or malware distribution lure. The document contains a large number of embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm. The primary purpose appears to be redirecting users to malicious content, potentially leading to further exploitation or credential theft.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9914

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://wastran.ru/uplcv?utm_term=comment+faire+le+bobinage+d%27un+moteur+electrique+pdf PDF link annotation
    • http://ewhamd.net/upFiles/ckeditor/files/2469851213.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-9-8/20210908150432762764.pdfIn PDF document text
    • http://riversedgefm.com/files/file/naxok.pdfIn PDF document text
    • http://stphilomenaonline.org/userfiles/file/dugotizixoxeweluwulalu.pdfIn PDF document text
    • http://patroha.hu/file/kutezibokinigukefumu.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161382760c8e43---dexusegegumujepudivolop.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/16134ade68d2aa---31404239223.pdfIn PDF document text
    • http://safedoorsystems.com/cmsimages/file/xesuruzo.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/f3036f1be8830990f872d5b1f669be90/kipexevovafopo.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/niwavozejanamumekixaluv.pdfIn PDF document text
    • http://hocomesun.com/upload/39573320112.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613275d3a5414---kolerofozeparu.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137f3dbdbe6d---20242521783.pdfIn PDF document text
    • http://tnslib.net/userfiles/files/juxogigulosazigujugog.pdfIn PDF document text
    • http://triatlonbizuterie.cz/sites/default/files/file/jamipowiturusumeriw.pdfIn PDF document text
    • https://stephankeppel.com/userfiles/file/gatedapomowesitapabewone.pdfIn PDF document text
    • https://hinodanang.com/uploads/image/files/86472919534.pdfIn PDF document text
    • http://logistra.fr/ressource/site-image/files/20180711036.pdfIn PDF document text
    • https://biharlokmanch.org/userfiles/file/25057570371.pdfIn PDF document text
    • https://daqing-jewelry.com/uploads/files/202109050750028442.pdfIn PDF document text
    • http://tentauto23.ru/ckfinder/userfiles/files/47134083485.pdfIn PDF document text
    • http://elazentrale.de/images/uploaded/file/tureresuwon.pdfIn PDF document text
    • http://phuketdriveschool.com/userfiles/file/63178877953.pdfIn PDF document text
    • http://antonio-pelella.eu/userfiles/files/5119024213.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/ulkv5ql67dr8q89sng1jii48lb/48530069219.pdfIn PDF document text
    • http://attep.com/home/sandbox/domains/heekee.com.hk/public_html/ckfinder/userfiles/files/25094564658.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_off0000b85e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB85E 11244 bytes
SHA-256: 5214997393f61a4e7458fb92441864062f0208e7d647664adce1ba2f1bcc8175
font_01_sfnt_off0000d206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD206 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ea18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA18 18216 bytes
SHA-256: fcd7268d66f2a9359a26b612f67be4b99f4f58d4fb337c1c783dc8e843f6928a

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