Malicious PDF — malware analysis report

Static analysis result for SHA-256 31be2732feb59a76…

MALICIOUS

PDF

74.3 KB Created: 2021-09-14 04:15:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c6ea11fe7cb260a7b215d9edc3e6e017 SHA-1: 460a9bfa07cfa75e74d8c7a745dac3da0f030cfe SHA-256: 31be2732feb59a76b69730574dedcdabc688184f20d6db36fb21ede87cc22d85
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and a raw IP address link, suggesting it is used to redirect users to potentially harmful websites. The PDF structure and embedded links are characteristic of phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://laborke.ru/uplcv?utm_term=offline+game+android+terbaik PDF link annotation
    • https://capitalsyndic.com/userfiles/file/manebavilevutugulas.pdfIn PDF document text
    • http://mega-treid.com/userfiles/files/julod.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/161300379ef9e2---zijibisapolixovufam.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/89557482444.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/wadogonesepivilu.pdfIn PDF document text
    • http://elitakhealing.com/ckfinder/userfiles/files/60576090231.pdfIn PDF document text
    • https://www.fangjin.org/ckfinder/userfiles/files/laluwetajuruzalu.pdfIn PDF document text
    • http://shepardinteriordesign.com/rw/upload/file/vesavemusuvebagape.pdfIn PDF document text
    • http://unionnutritech.com/upload/files/xovamoxaxajuzepusovubifib.pdfIn PDF document text
    • http://yenidenyuzlendirme.com/ckfinder/userfiles/files/6316870419.pdfIn PDF document text
    • http://kxqcgs.com/filespath/files/20210912062606.pdfIn PDF document text
    • http://aan.kz/ckfinder/userfiles/files/pabexazerigexetumejiseto.pdfIn PDF document text
    • https://jpt.mysmartedu.com/uploadimages/files/56967991016.pdfIn PDF document text
    • http://unsersohn.ch/images/file/kexemeginimugonoxurid.pdfIn PDF document text
    • http://yousefmaktabi.com/ckfinder/userfiles/files/jesolapebedixudigama.pdfIn PDF document text
    • http://xn--e42bt3l.net/upfile/files/fumugojadogijitasu.pdfIn PDF document text
    • http://nessie-vinylcare.com/file/limojud.pdfIn PDF document text
    • http://hanifeugur.com/image/files/91627561462.pdfIn PDF document text
    • https://totounited.com/contents/files/wivafelapa.pdfIn PDF document text
    • http://torremaggiore.sitmap.it/files/files/gotadukop.pdfIn PDF document text
    • http://samuiluxurytravel.com/Uploads/file/falepotizigopabal.pdfIn PDF document text
    • http://zekidilektekstil.com/images_upload/files/tojotokalodisu.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/pulezor.pdfPDF link annotation
    • https://0286869143.com/editor_images/files/78550682103.pdfIn PDF document text
    • http://devison-matras.com/upload/file/jamebibovurobedalini.pdfIn PDF document text
    • http://soldearenales.com/galeria/files/talovuvifesofatijivi.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_off0000c06b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC06B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d87d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD87D 16484 bytes
SHA-256: fe28fb38fdd67a19dbfc41b8ec5cbf330bf00f8090757fbcae0a12444be2457b
font_02_sfnt_off0001026c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1026C 10784 bytes
SHA-256: 326930254eb6ce2e7fb1f372184ebc50850f96d5875b14e96828377f82f25991