Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce68579af160e207…

MALICIOUS

PDF

89.2 KB Created: 2021-07-29 12:30:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 5bb95452c2009bc2b3151139767491ba SHA-1: bff921389c572d39a8b7911d436a70e10ceef556 SHA-256: ce68579af160e207551a5d779702d4517ffb59a7d5b772f8c9eb14911e672180
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that point to potentially compromised WordPress upload storage or other disposable hosting. The primary goal appears to be directing users to external sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/lko0d6n22l18ukkuu14jmp06gp/rodumokeziniwogepapif.pdf In PDF document text
    • http://china-miyaco.com/img/file/2021729142146.pdfIn PDF document text
    • http://ping-property.com/user_img/files/zejatoraxipoz.pdfIn PDF document text
    • https://zhbiotech.com/CKEdit/upload/files/89321634171.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160a4ee9304072---62486222996.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160df8abe7d3d5---rejimuragutawemojuvix.pdfIn PDF document text
    • http://niestachow.pl/data/aktualnosci_imgs/file/68928406327.pdfIn PDF document text
    • http://accessibilite-salle-eau.com/ckfinder/userfiles/files/91604338897.pdfIn PDF document text
    • https://eccdc.org/application/webroot/userfiles/file/fonaronafira.pdfIn PDF document text
    • http://www.clc-engineering.com/siteuploads/editorimg/file/98342843631.pdfIn PDF document text
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/2r85645d300ni2krok7au7s8o5/kidajarukuxibu.pdfIn PDF document text
    • http://strandedtattoo.net/file/tekigejajotugobuluxesotag.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/s729pha99thjsi1cvuue7jufjk/gonasizutoxominunat.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609a31c81c610---49069791728.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/2a9d6751e2f975a178cf143b1364f25c/zufesa.pdfIn PDF document text
    • https://handinhand-daycare.com/ckfinder/userfiles/files/xatopuduwar.pdfIn PDF document text
    • http://mygiftltd.com/userfiles/file/paxiwonuxavofoj.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/16079210c06247---83107311876.pdfIn PDF document text
    • https://lawina-radom.pl/files/file/33332734970.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/j8421p9rqr1jgq0dv24go42eth/54239213259.pdfIn PDF document text
    • https://ivanamihic.com//files/72882905615.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/4g8fbcva053ir9noikr128e5g1/64562749632.pdfIn PDF document text
    • https://mimpi1pusat.com/contents//files/59093499594.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a0bf856c58d---lisenuwa.pdfIn PDF document text
    • http://neonatal-surgery.ru/userfiles/files/funov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=hataraku+maou-sama+light+novel+volume+17+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBF 17316 bytes
SHA-256: 561211d3abc7b8c05d61a29858a4147567c29e59d747ea8a8c74bb2d18e411a7
font_01_sfnt_off00011b33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B33 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013340.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13340 1832 bytes
SHA-256: 029e8b94f7f91dc031989eee3d97b12e6bd38cf8f78461274dcedcf954fd5cfd
font_03_sfnt_off00013bd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BD8 11332 bytes
SHA-256: a7b9229bea443ca39db946082841246dc854ec0b11c07b1fc3f580567240d1e6